✔ Develop your mind and creativity by discovering a perfect Sudoku book that allows you to take it with you everywhere. ★ Our Sudoku book is the perfect mind-training and travel companion, with 100 hard puzzles and 100 advanced puzzles so you can take it with you everywhere. There are only 2 puzzles per page, which makes it easy for you to perform your solving performance with large, clear games, and after each chapter you will also find possible solutions to check yourself, get hints or for tricky cases where you can't find any possible solution. ♥ Get this activity book, perfect for both when you go on holiday and for relaxing moments in the comfort of your own home. ★ Our Sudoku book features: Each page contains 2 Sudoku puzzles, numbered, indicated by difficulty level and with additional details where you can enter the time spent solving the game and the level of satisfaction for each puzzle. Designed from hard to advanced level games. Large 8.5 x 11 '' format 130 pages. ✔ Sudoku puzzles are challenging and fun for the mind, and so is our book.