Dive into this challenging collection of the world's favourite puzzle, with 210 brand-new sudokus to savour. The Guardian's sudoku puzzles are enjoyed by hundreds of thousands of people every day and are now available in this carefully curated compilation. These previously unpublished puzzles increase in difficulty as the book progresses, so will test everyone from a sudoku novice to a seasoned expert.

Lose yourself in another mystifying collection of puzzles from the UK's most devious cryptic crossword creators. The Guardian's cryptic crosswords are enjoyed by hundreds of thousands of people every day. Now you can test your powers of linguistic deduction and lateral thinking against 120 classic puzzles from the Guardian's extensive archives with the fourth book in the Guardian cryptic crossword series.

Test your wits against 210 difficult previously unpublished killer sudoku puzzles in the first book in the new Guardian puzzle book series.

The Guardian's killer sudoku puzzles are enjoyed by hundreds of thousands of people every day. While only a minimal level of mathematical knowledge is needed, all of your logical reasoning will be required to solve these brand-new puzzles. The puzzles have been designed to increase in difficulty as the book progresses, meaning this book can be enjoyed by novice and master alike.

As addictively enjoyable as they are compulsively difficult, get ready for hours of fun with these high-quality puzzles.

The Guardian's cryptic crosswords are enjoyed by hundreds of thousands of people every day. Test your powers of linguistic deduction and lateral-thinking against 120 classic cryptic crosswords from the Guardian's extensive archives, with the first book in the new Guardian puzzle book series.

This collection of bite-sized crosswords provides more than 200 speedy challenges to tackle. From the experts at the Guardian comes this brand new and entertaining collection, the fourth in the series of quick crossword puzzle books. The Guardian crosswords are enjoyed by hundreds of thousands of people every day, celebrated for their wide variety of clues spanning a vast range of subjects.

With more than 200 small – but smart – crosswords, this book provides an excellent series of bite-sized challenges. The Guardian's many crosswords are enjoyed by hundreds of thousands of people every day. With a wide variety of clues from a vast range of subjects, these crosswords will provide a stern but gratifying examination of your vocabulary. This is the second in a brand-new series of Guardian puzzle books.

Test your wits against 210 brand-new killer sudokus with this formidable collection of the world's favourite puzzle. This compilation draws on all the knowledge of the expert puzzle writers at the Guardian, whose killer sudokus are enjoyed by hundreds of thousands of people every day. All of your logical reasoning will be required to solve these previously unpublished puzzles, specially designed to increase in difficulty as the book progresses.

This book contains more than 200 crosswords, perfect for a quick – but challenging – test of your deductive skills.

The Guardian's many crosswords are enjoyed by hundreds of thousands of people every day. With a wide variety of clues from a vast range of subjects, these crosswords will provide a stern examination of your lexical knowledge, but are concise enough to be solved in bite-sized chunks. This is the first in a brand-new series of Guardian puzzle books.

Lose yourself in these compulsively enjoyable puzzles, compiled by the UK's finest cryptic crossword creators. The Guardian's cryptic crosswords are enjoyed by hundreds of thousands of people every day. Test your powers of linguistic deduction and lateral-thinking against 120 classic puzzles from the Guardian's extensive archives, with the second book in the new Guardian puzzle book series.

Over 200 puzzles from the UK's leading crossword experts. From the Guardian comes this brand-new collection of quick crosswords, the third volume in the popular series. With a vast range of clues from a wide variety of subjects, these crosswords will sharpen your vocabulary and stretch your mind, but are short enough to be solved during breaks in the day.

The UK's most devious cryptic crossword setters present 120 fiercely challenging puzzles. The Guardian's cryptic crosswords are enjoyed by hundreds of thousands of people every day. Now you too can test your powers of linguistic deduction and lateral thinking against more than 100 classic puzzles specially selected from the Guardian's archives.

Test yourself against the world's favourite puzzle, with 210 previously unpublished sudoku to savour.

The Guardian's sudoku puzzles are enjoyed by hundreds of thousands of people every day. These brand-new puzzles will provide hours of entertainment for anyone who enjoys unwinding with some mental gymnastics. The puzzles have been designed to increase in difficulty as the book progresses, meaning the book can be enjoyed by both novice and master alike. This it the first book in a new Guardian puzzle series.

*New and Updated edition* It was the biggest leak in history. WikiLeaks infuriated the world's greatest superpower, embarrassed the British royal family and helped cause a revolution in North Africa. The man behind it was Julian Assange, one of the strangest figures ever to become a worldwide celebrity. Internet messiah or cyber-terrorist? Information freedom fighter or sex criminal? In this newly updated edition, award-winning Guardian journalists David Leigh and Luke Harding follow the story as it takes on ever-weirder twists and turns. In London, Assange went to ground in the back bedroom of the Ecuadorian embassy. Meanwhile, in a courtroom near Washington, the fate of the US army whistleblower Bradley Manning hung in the balance. And in Hawaii, a young man named Edward Snowden, working as a contractor for the National Security Agency, was about to take WikiLeaks into even darker territory. 'A rip-roaring narrative of secrets, tantrums, technological wizardry, personal betrayal and vengeance.' Irish Independent 'Excellent.' Sunday Times 'Enjoyable... The WikiLeaks founder comes across as a shadowy, manipulative character with the habits of a tramp and the brain of a chess grandmaster.' Spectator 'Superbly narrated...unputdownable.' Observer

The entire 16th season of the long-running cult classic. Tom Baker, the popular fourth Doctor, is joined by the beautiful Romana (Mary Tamm) in this 26-episode intergalactic treasure hunt for the all-powerful Key to Time. Includes six storylines: 'The Ribos Operation', 'The Pirate Planet', 'The Stones of Blood', 'The Androids of Tara', 'The Power of Kroll' and 'The Armageddon Factor'.

When the Guardian relaunched their new Berliner sized paper this autumn, they chose Kakuro as one of their launch vehicles. Kakuro (called Kakro in Japan and Cross Sums in the USA) has become the new number puzzle phenomenon gathering millions of fans worldwide. Older than puzzle favourite Sudoku and played for many years in Japan, Kakuro is best described as a kind of mathematical crossword. Like Sudoku, Kakuro is played on grids of varying sizes. Each grid consists of blank and filled squares similar to a crossword puzzle and the object of Kakuro is to fill in each of the white squares with the numbers 1-9 so that each set of blanks adds up to the total to the left or above. The same number cannot be used more than once in each set. Some filled in squares have a diagonal slash across them with two numbers - one above and one below the diagonal. These are the 'clues' - the number in the top right corner relates to a horizontal 'clue' and the one in the bottom left corner relates to a vertical one. The Guardian Book of Kakuro features over 100 different number puzzles, graduating from 40 simple number games to 20 puzzles of medium difficulty and then finally featuring some really tough puzzle games for those who have mastered the skill. Each puzzle has been hand crafted by a Japanese inventor and is wholly original. The Guardian Book of Kakuro includes four pages of 'How To', explaining the rules and featuring example puzzles, plus a page of unique number combinations.