200 difficult previously unpublished killer Sudoku puzzles.

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Newspaper-branded puzzle books are perennial bestsellers, with hundreds of thousands sold in the UK every year.

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The Guardian is both award-winning and one of the best-loved newspapers in the UK, and is consistently voted the UK's most trusted paper.

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The Guardian has a well-established puzzle range which is included in its daily newspaper. It also launched a successful Guardian Puzzles app in 2020.

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This book is one of four titles launching the new Guardian Puzzle Book range, with more to come in the future.