Collected over several years by Peter Winkler, of Bell Labs, dozens of elegant, intriguing challenges are presented in Mathematical Puzzles. The answers are easy to explain, but without this book, devilishly hard to find. Creative reasoning is the key to these puzzles. No involved computation or higher mathematics is necessary, but your ability to construct a mathematical proof will be severly tested--even if you are a professional mathematician. For the truly adventurous, there is even a chapter on unsolved puzzles.

Extreme Spot the Difference is the ultimate photo puzzle challenge. Tougher, more engaging and more visually impressive than anything you've seen before, this book takes you on a tour of the world's most beautiful, busy and exotic cities in amazing extreme detail.

A NEW TWIST ON A POPULAR PUZZLE CUBE! Invented by Piet Hein, the Soma cube is one of the most famous mechanical puzzles in the world. The traditional challenge and outcome is to build a cube or other structures from all seven pieces.CHANGE THE RULES, CHANGE THE OUTCOME! The puzzles in this unique Soma-inspired collection are no longer predicated upon using all seven pieces at one time! By varying the number of pieces, there are many new and versatile puzzle challenges, from all types of recreational mathematics fields. For example, you will find symmetry puzzles, cover-up puzzles, and even fraction puzzles. The chapters are divided according to the number of pieces used; from single-piece puzzles to puzzles requiring a complete set.WHY USE THE SOMA CUBE? From the moment our creative team changed their rules of engagement for this new collection, the potential puzzle challenges and their solutions became nearly limitless! There is something magical and enchanting in those seven pieces that enabled us to find many puzzles and challenges!NEW CHALLENGES Most of the puzzles demonstrated within the book are original. Some are based on classic puzzles, as well as more modern ones, modified and presented by using the set of Soma pieces.LOW COST AND HIGH INTEREST FOR HOURS OF ENTERTAINMENT WITH INCREASING COMPLEXITY! This is a unique collection of puzzles - all you need is a set of the Soma cube. The puzzles range from easy to difficult and they appeal to a wide audience - all within the reach of the general public. It presents many geometrical and mathematical principles, and makes them easier to understand. However, no special knowledge in mathematics or geometry is required.

Challenge your brain at home with these enjoyable puzzles. 100 puzzles from The Times adapting the cryptic puzzle for those with a hectic lifestyle and schedule. Ideal for those starting out with cryptic crosswords, and those who'd like to tackle the main puzzle but feel daunted, or who can perhaps only solve a handful of clues. Appearing Monday to Friday in the puzzle pages of Times2, this crossword has a reduced 13x13 grid size and reduced difficulty too, the intention being to encourage people to take their first steps in tackling cryptic crosswords. And also to cater for those of us who have limited time to devote to our favourite pastime and need a ready-made set of puzzles that is solvable in a short space of time.

A NEW TWIST ON A POPULAR PUZZLE CUBE! Invented by Piet Hein, the Soma cube is one of the most famous mechanical puzzles in the world. The traditional challenge and outcome is to build a cube or other structures from all seven pieces.CHANGE THE RULES, CHANGE THE OUTCOME! The puzzles in this unique Soma-inspired collection are no longer predicated upon using all seven pieces at one time! By varying the number of pieces, there are many new and versatile puzzle challenges, from all types of recreational mathematics fields. For example, you will find symmetry puzzles, cover-up puzzles, and even fraction puzzles. The chapters are divided according to the number of pieces used; from single-piece puzzles to puzzles requiring a complete set.WHY USE THE SOMA CUBE? From the moment our creative team changed their rules of engagement for this new collection, the potential puzzle challenges and their solutions became nearly limitless! There is something magical and enchanting in those seven pieces that enabled us to find many puzzles and challenges!NEW CHALLENGES Most of the puzzles demonstrated within the book are original. Some are based on classic puzzles, as well as more modern ones, modified and presented by using the set of Soma pieces.LOW COST AND HIGH INTEREST FOR HOURS OF ENTERTAINMENT WITH INCREASING COMPLEXITY! This is a unique collection of puzzles - all you need is a set of the Soma cube. The puzzles range from easy to difficult and they appeal to a wide audience - all within the reach of the general public. It presents many geometrical and mathematical principles, and makes them easier to understand. However, no special knowledge in mathematics or geometry is required.

Put your brain to the test with this selection of 200 puzzles designed to challenge, stimulate and entertain! With puzzles for all abilities, from novice to seasoned puzzler, there is something here for every crossword fan. Whether killing time at home or facing the daily commute, these brainteasers will provide hours of fun.

An ornithological quiz book packed with challenging questions for birders, based on the popular 'Bird Brain of Britain' contest at the annual BirdFair. The British Birdwatching Fair, held every August at Rutland Water Nature Reserve, attracts over 30,000 visitors every year. One of the most popular attractions in the events marquee is the 'Bird Brain of Britain' contest. Each of the four contestants must answer a set of questions on their nominated specialist subject, and a second set on general (ornithological) knowledge. The participants have included popular presenters and experts throughout the years, including Stephen Moss, Chris Harbard, Mark Andrews, Nigel Redman, Mike Dilger and David Lindo, among many others. The book will feature the questions asked in the contest over its 30-year lifespan. Many seemingly simple questions turn out to have complex answers, and some that seem difficult have a very simple explanation. The questions are difficult and varied enough to test any birder's knowledge, and will provide many hours of challenging entertainment. Be they trivial, idiosyncratic, baffling or strange, the varied bird trivia included makes this compilation as entertaining and enlightening as it is educational.

**A perfect loo book - full of fiendishly clever word games and brainteasers** Ah, the tedium of the toilet. The boredom of the the bathroom. If only there was a more edifying way to pass the time while carrying out your morning ablutions. Well now there is! *Train your mind while on your behind!* Featuring 102 fiendishly clever word games, brainteasers, puzzles and quiz questions, this is the ultimate bathroom book for your home, or a superb stocking filler for the lofty loo book lover in your life. *It's quizmas time for business time!* For those who've enjoyed The Shiit Workout, 52 Things to do on the Loo, and Things to do While you Poo on the Loo. *Search for solutions while doing your ablutions!*

Do you feel like you've solved enough traditional Sudoku, crosswords and logic problems to last a lifetime? Thinh Lai's Puzzle Universe is the second book in an exciting new series for everyone who loves puzzles and wants something fresh! Vietnamese puzzle master Lai Van Duc Thinh has created a series of original puzzle types sure to test the skills of even the most experienced puzzle-solver. Creatively stimulating new puzzles include Bar Code, Elbow Room, Boxing Match, Borderlands and more, each of which come with full instructions on how to solve them, as well as a variety of difficulty levels to aid in your progression.

'Great fun. Railway travel without leaving your armchair!' Chris Tarrant A jam-packed puzzle and trivia book about Britain's iconic railways. The Big British Railway Puzzle Book is a must-buy gift book for puzzle book fanatics, train and travel enthusiasts, history buffs, and the people up and down the country who love their heritage and their regional identity! Featuring a treasure trove of puzzles about railways and locomotives, using maps, old routes and tracks, original posters and all things that delight train lovers, the book also includes mind-boggling brainteasers, navigational tests, word games, code-crackers, anagrams, crosswords, mathematical conundrums and more. As well as having over 100 mind-bending puzzles, the book also contains historical facts and figures, trivia and introductions to each section authored by Dr Thomas Spain, a research associate at the National Railway Museum, about the history of the British Railways. From the National Railway Museum in York!

Are you stuck on that final clue? Or do you just need a prod in the right direction? The Chambers Crossword Lists is the ideal reference for crosswords of all types - cryptic, quick and general knowledge. Hundreds of categories From abbey names to zoological terms, the categories in the Chambers Crossword Lists will help you fill in the gaps in both your knowledge and your crossword. Fully updated The Chambers Crossword Lists have been loved by a generation of crossword solvers. This edition is fully updated, with new categories added including websites and computer games, as well as old gaps filled in such as Chinese dynasties and the Cinque Ports. Easy to use The categories appear in alphabetical order. Within each category, the lists are organised first by the number of words, and secondly by alphabetical order.

A jam-packed puzzle and trivia book about the birds in Britain, in collaboration with the RSPB. Can you tell your rook from your crow? Do you know the collective noun for a group of goldfinches? Or where a willow warbler goes when it migrates? A must-buy for any bird enthusiast or bird-watching novice, this puzzle book is filled with questions, word games and brainteasers that will test your ornithological knowledge and reveal a treasure trove of incredible facts about our feathered friends - covering topics such as garden birds, coastal and country birds, behaviour, biology, culture, rare birds and bird migration. Featuring over 150 puzzles, from quiz questions to illustrations of birds to test your identification knowledge, wordsearches and crosswords, as well as maps to explore flight patterns, the RSPB Great British Birdwatcher's Puzzle Book will put your friends and family through their paces, and on the path to becoming an ornithological expert.

A Vogue 2021 gift guide pick "For someone who adores flowers, it would be a joy to put together this puzzle." --House Beautiful, Beautiful Things: Gifts to Give Your Home A rose in full bloom. What is more captivating? Adapted from a nineteenth-century chromolithograph from the collection of John Derian, the artist and designer whose work with printed images of the past transports the viewer to another world, Garden Rose challenges the puzzle doer with its subtle tones of parchment and repetition of leaves and thorns, and utterly enchants with the delicate pink bull's-eye of its single, mesmerizing bloom. Featuring: 1,000 interlocking pieces Mini-poster (6 3/4" x 9 3/8") for reference or framing Completed puzzle size: 18 7/8" x 26 3/8"

Really, Mr. Collins,' cried Elizabeth with some warmth, 'you puzzle me exceedingly...' - Pride and Prejudice. Enter the world of Pride & Prejudice & Puzzles, a beautifully realised puzzle collection that transports you to Jane Austen's England - a land of polite intrigue and conjugal contrivance. Permit yourself the indulgence of an interval of recreation and amusement to make your acquaintance with the riddles and conundrums contained within; for you are sure to receive no inconsiderable pleasure from the puzzling over and resolving of them. Your quest for an amiable distraction will be over, leaving your curiosity entirely satisfied. Puzzles there are plenty, clues there are many, and the pages are handsomely decorated with fine engravings entirely suited to the subject matter.

*** Test your knowledge and speed with this brand new edition of quick crosswords from the Daily Mail. With more than 400 quick crosswords to choose from, this bumper collection is the perfect way to enjoy some spare time and flex that grey matter simultaneously. The Daily Mail Big Book of Quick Crosswords Volume 4 is the ideal companion for puzzle enthusiasts.

Part of an exciting series of sturdy, square-box 1000-piece jigsaw puzzles from Flame Tree, featuring powerful and popular works of art. This new jigsaw will satisfy your need for a challenge, featuring artist Nel Whatmore's "A Million Shades". This 1000 piece jigsaw is intended for adults and children over 13 years. Not suitable for children under 3 years due to small parts. Now includes an A4 poster for reference. Nel Whatmore is a fine artist, well known for her floral paintings and abstracts. As with many of her paintings, A Million Shades was built up over several months, until Nel was happy with the final piece. A contemporary colourist, her paintings are both expressionist and evocative. She seeks t o constantly explore mediums and their ability to convey emotion. Her work i s varied, with landscapes and skyscapes featuring alongside still life and floral works, which encapsulate her interest in expressionist painting. She expresses her love of flowers not only through her fine art, but also her textile designs, and regularly exhibits her work at the Chelsea Flower Show.

THE TANGRAM is one of the oldest types of dissection puzzles in the world that originated from China. It traditionally requires the participant to arrange seven pieces (or 'tans') into a shape just by looking at the given silhouette.LEARN WHILE PLAYING The puzzles in this unique book are fresh, innovative and compelling. The puzzle pieces are building units for puzzles that boost mental dexterity with a variety of challenges from various fields of recreational mathematics. Come on and play with symmetry puzzles, cover-up puzzles and self-similarity puzzles to increase your skill and mental acuity!NEW PUZZLE DESIGNS To add variety and challenge, some of the puzzles may not use all seven pieces of the Tangram set, while others may use pieces from two or more sets.The authors utilize a creative twist in this collection that is different from classic Tangram puzzles: Most of the puzzles do not allow connections between the pieces unless they share a common edge. With this slight change to the rules, an entirely new universe of Tangram puzzles and challenges is unleashed to delight the puzzle solver!PROVIDES HOURS OF FUN The majority of the puzzles in this book are new and original. They range in difficulty to suit various levels of puzzle enthusiasts. Some selections are based upon famous classic puzzles while others are modified to stimulate and captivate the puzzlist as they have done for more than a thousand years!

Looking for the perfect gift for that boating enthusiast in your life? Or that trivia buff who has everything? Well, you've found the answer in "Name that Boat!" .Or maybe you're the one who loves a challenge?"Name that Boat!" is the saltiest book ashore and will tease and please you with it's interesting, intriguing and wide-ranging questions taken from boats real and imagined. History, TV, literature, movies-you name that boat and chances are you'll find it here.Read "Name that Boat!" and amaze and surprise with your knowledge of this specialized area of trivia. After all, how many of us know the name of the boat that brought the Statue of Liberty to America?. or Lt. Pinkerton to his Madam Butterfly?. or the Maltese Falcon to San Francisco?. and thinking of Bogart.the name of the boat he and Katherine Hepburn brought to stardom on the big screen?.Yes, "Name that Boat!" is the gift that will be enjoyed and shared by everyone who loves boating or trivia. Be sure to surprise that special person with this unique gift. Perfect for those 'hard to buy for' readers and sailors.