Big Sudoku Book with 1000 Puzzles1000 Sudokus (6 puzzles on each page)2 levels of difficulty (easy to hard)Book size: 8.5 x 11 inchSolutions at the back of the bookThe Sudoku puzzle book is the perfect gift for adults who love brain jogging and mental excercises.Sit back, put your feet up, and get ready to relax with this great collection of Sudoku puzzles guaranteed to bring a little piece of joy to your daily life.So what are you waiting for? Grab yourself a copy! (Hint: This collection also makes a great gift to the Sudoku fanatic in your life!)Pssst...one more thing.Did you know the American Alzheimer's Association has endorsed Sudoku as a "brain game" that might help to reduce risk of dementia as we get older?That's what we call a "win win" in the business!