10003 Great gift for family, friends or work colleaguesThis Jigsaw Sudoku book is packed with the following features:9312 1000 Jigsaw Sudoku Puzzles from Medium to Very Hard (333 Medium 334 Hard 333 Very Hard) 9313 Each puzzle is guaranteed to have only one solution 9314 Answers to every puzzle are provided at the back of the book 9315 Six puzzles per page (8 5 x 11 inches) Playing Jigsaw Sudoku is not just a fun way to pass the time, due to its logical elements it has been found as a proven method of exercising and stimulating portions of your brain, training it even if you will and just like training any other muscle regularly you can expect to see an improvement in cognitive functions Some studies go as far as indicating regular puzzles can even help reduce the risk of Alzheimers and other health problems in later life Completing Jigsaw Sudoku regularly helps the brain process both problem solving and improves the logical thought process with the use of deductive reasoning, which can also be applied to approaching reallife challenges in a different manner Includes free bonus puzzles you can download book (Logic Puzzles Brain Games for Adults) The Giant Book of Jigsaw Sudoku offers hours of entertainment for adults of all ages, from young adults to seniors 9829 We hope this will be an entertaining and uplifting mental workout, enjoy The Giant Book of Jigsaw Sudoku 9829