Brain Fitness Boot Camp is a fun and energetic range of puzzle books designed to wake up your brain and get it into peak condition. It's like having your own personal fitness instructor - without the shouting! TOUGH puzzles are not for the faint hearted - you'll need to muster all your powers of observation, logic, lateral thinking and arithmetic to get through this series of hardcore mental challenges.

Join the world's greatest fictional detective and use your own powers of deduction to solve these ingenious enigmas. This remarkable collection features all kinds of puzzles to suit all tastes and levels of logical skill - from 'elementary' to 'impenetrable'. 'You know my methods, apply them' Sherlock Holmes - The Sign of Four.

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.

Wordle Challenge for Kids is the perfect companion for younger wordle fans, offering 100 puzzles designed specially for kids. This fun, interactive collection of brain-teasing puzzles will entertain children for hours and hours as they search for the right word to complete each grid. These stimulating puzzles are graded from Easy to Expert level. Puzzlers must guess what the correct word is, deducing from previous words in the grid what letters go where. A clue means there is only one correct solution to each puzzle, and answers can be found at the back of the book. Great for developing kids' vocabularies and an ideal source of screen-free entertainment, this collection will have kids enthralled. This book is the perfect giftfor any young puzzlers who can't get enough of the sensation word game and wishes they could do more!

For half a century, the KGB was the most feared agency in the world, and the security organisation's noble agents operated in secret to further the glorious Soviet cause in countries around the globe. In the KGB Killer Puzzles Dossier you can attempt to crack the codes and solve the puzzles that the KGB would have set their finest agents in order to ensure they were ready for their time in the field. More than 100 tests of memory, cryptic ciphers and logical brainteasers await those who want to learn more about the dark arts of the greatest spies ever. Further, a series of survival secrets are revealed to ensure your time under cover is not quite as short-lived as the enemy agents would like.

Enter the genre-defining worlds created by five masters of speculative fiction in The Science Fiction Puzzle Book. Featuring the prolific works of Isaac Asimov, Ray Bradbury, Arthur C. Clarke, Robert A. Heinlein and Ursula K. Le Guin, become part of their futuristic, dystopian and world-building adventures with this series of enigmatic puzzles. Containing more than 100 enigmas, riddles and conundrums, all taking inspiration from their extraordinary stories and vivid worlds, explore new galaxies and new technologies while solving challenges all written in the distinctive and brilliant styles of these five stars of science fiction. 'A knotty puzzle may hold up a scientist for a century' – Isaac Asimov, The Robots of Dawn.

Featuring 150 iconic artworks, The National Gallery Masters of Art Puzzle Book is a visually spectacular puzzle challenge perfect for any art-enthusiast. This must-buy gift book contains 100 puzzles reproducing and inspired by the world's most famous paintings, making it a truly one-of-a-kind decorative delight. From pictorial puzzles such as Fake or Fortune, Jigsaw and Scrambled Image, to cryptic puzzles like Odd One Out or The Missing Link, through logic puzzles, riddles and even a series of progressively more difficult art knowledge quizzes, there is something for everyone, from the puzzle master to the art aficionado. Featured paintings include Sunflowers by Vincent van Gogh, The Fighting Temeraire by J.M.W. Turner, The Arnolfini Portrait by Jan van Eyck, The Hay Wain by John Constable, The Virgin of the Rocks by Leonardo da Vinci, Bathers at La Grenouillere by Claude Monet and many, many more.

Continuing the popular Overworked & Underpuzzled series, Killer Sudoku contains almost 200 tricky puzzles requiring a certain amount of logic and skill to solve. Killer Sudoku is often seen as the most challenging Sudoku, and so this is the perfect puzzle book for anyone who loves to be tested during their coffee break. With nearly 200 puzzles, this is a tricky collection perfect for anyone who works too hard and likes to reset their mental faculties with a classic logic test.

Join the world's greatest fictional detective and use your own powers of deduction to solve the 60 ingenious enigmas on these cards. This collection features many types of puzzle to suit all tastes and levels of logical skill - from 'elementary' to 'impenetrable'.

The game is afoot once more, and Sherlock Holmes and Dr Watson are back to solve criminal mysteries and puzzles alike.

In Sherlock Holmes Mind Palace Puzzles, Dr John Watson shares the great detective's memory-boosting techniques to help you start to think the Sherlock way. As you work your way through Watson's latest selection of his esteemed colleague's cases, Sherlock shares his knowledge of how the human brain works, meaning that you will find your memory skills improving until you too can create your very own Mind Palace!

The book includes more than 100 memory puzzles and classic Sherlock mysteries to solve, all written in the style of Sir Arthur Conan Doyle's revered stories.

Improve your faculties with 70 specially commissioned puzzles, riddles and enigmas concocted by the one detective who needs no introduction, Mr Sherlock Holmes. Dr John Watson, the dear friend and companion of Holmes, has taken the liberty of assembling this collection of trials so you too can test your analytic abilities and hone your deductive sense to avoid making hasty assessments and faulty conclusions. These rudimentary puzzles have been grouped into approximate levels of difficulty but every question is easy if you know the answer, and the opposite holds equally true.

This essential reference book details everything the novice needs to know about the genre and everything the well-read fan is calling out for. Lavishly illustrated and expertly informed, it is edited by Tim Dedopulos and David Pringle, editor and co-founder of the internationally acclaimed Interzone magazine, and features forewords by legendary authors Terry Pratchett and Ben Aaronovitch. They have assembled a team of expert contributors to compile a visually stunning, informative and fascinating guide to the world of fantasy, from its origins and early trailblazers to the cultural phenomena of today's mega fantasy properties.

Mensa's Most Difficult Pattern Puzzles provides an exceptional challenge for even the most adept of puzzlers. Your mind will need to be at its most nimble to spot the patterns and crack the colourful codes hidden within these conundrums. With puzzles ranging from spatial awareness challenges to colour hue conundrums, this vibrantly fiendish puzzle book will keep you entertained for hours.

Join the world's greatest fictional detective and use your own powers of deduction to solve these puzzling mysteries. The Sherlock Holmes Case Book: Solve-It-Yourself Mysteries is a remarkable collection of crimes from Dr John Watson's case notes that features all of the twists and turns that have come to be expected from a Holmes case - but now it is up to you to solve them. There are 10 cases to be cracked, each of which requires the reader to use logic and powers of perception to answer a question at three points - the beginning, the middle and the end.

Holmes and Watson are back. Fresh from solving the baffling puzzles in The Sherlock Holmes Puzzle Collection, Dr John Watson returns with a new selection of his esteemed colleague's lost cases - an even more daring, difficult and downright perplexing bunch of conundrums. All written in the style of Sir Arthur Conan Doyle's great stories, this book deeply involves the reader in the solving of puzzles - and crimes!

The Sensational Houdini's Puzzle Safe contains 50 exciting puzzles inspired by the greatest escapologist to have ever lived. With puzzle chains where one wrong answer can leave you locked in a never-ending circle of puzzles, and logic problems designed to confound the minds of the unworthy, this puzzle book is an enjoyable test for all. Unlock your brain and see if you can escape the challenges inside.

The Ripper Case Files provides hours of in-depth sleuthing for the macabre-minded. There are ten cases to be cracked, each of which requires you to answer a question at three points - the beginning, the middle and the end. Welcome to the murky underbelly of Victorian London, where Jack the Ripper still roams free - he must be caught before the public discovers that his gruesome murder spree continues. You must use your powers of deduction to outwit the Victorian detectives and solve the monstrous cases presented, culminating in uncovering the Ripper himself! This grisly collection of crimes isn't for the faint of heart, packed with shocking details and insider police knowledge; there will be twists and turns to keep even the keenest-eyed amateur PIs on their toes.

Join the world's greatest detective and use your own powers of deduction to solve this series of ingenious enigmas. This pack contains puzzle cards, a book of clues and tips for solving like the great man himself, a clue-taking notepad, a timer and all puzzle solutions and explanations. With puzzles rated from Elementary to Fiendish, there's something to challenge every sleuth. 'You know my methods, now apply them.' Sherlock Holmes.

More than 50 specially commissioned riddles and conundrums, themed around the casebook of Sherlock Holmes""You know my methods, apply them." --Sherlock Holmes"There's no greater (fictional) puzzle-solver that Sherlock Holmes, and now puzzlers can learn Holmes' methods and become master sleuths. This remarkable collection features all kinds of specially commissioned puzzles set in the world of Sherlock Holmes, along with superb period artwork combined with a contemporary design. The puzzles are designed to test readers' powers of perception, logic, and deduction, and solutions to each puzzle are included.

Continuing the popular Overworked & Underpuzzled series, Calming Crosswords contains more than 100 crossword puzzles certain to stretch the brainpower of every puzzle-lover. The crosswords have been designed to give your vocabulary and lateral thinking skills a good work-out, but not to be unachievable for the average crossword-puzzler. This is the ultimate challenge for anyone who works too hard and deserves to let their brain relax into a calming crossword collection.

Join the world's greatest fictional detective and use your own powers of deduction to solve these ingenious enigmas. This fiendishly difficult collection features all kinds of puzzles and will test the most skilled of puzzle detective. 'You know my methods, apply them.' Sherlock Holmes.

Sherlock Holmes may be the world's greatest detective, but he needs your help. Join the renowned sleuth and his assistant Dr Watson as they travel across Victorian England, encountering mysterious crimes along the way. Using just Watson's illustrated case notes, can you unravel the twists and turns of each remarkable story? After reading ten original cases, you will need to solve baffling questions such as: * Who murdered the High Court judge, and why? * How did the Baker Street Irregulars know the warehouse robbery was an inside job? * And did the stonemason really die in a climbing accident? Are you up to Sherlock's challenge?

Sharpen your sluggish brain with 70 specially commissioned puzzles and challenges devised by Baker Street's legendary detective. Sherlock Holmes' famous sidekick and longtime friend, Dr John Watson, recounts the mental exercises Holmes conceived for him so that you too can strengthen your facilities for analysis, logic, reason, arithmetic, creative thought and deduction. These cunning puzzles have been grouped by their approximate difficulty but as a wise man once said, 'All questions are hard if you don't know the answer, and easy if you do.'