WF Graham Large Print A5 Sudoku Puzzle Books for Adults and Teens Pack of 4 Activity Book Set with over 150 Puzzles Each

[Over 600 Unique Puzzles in Total] - Each Sudoku puzzle book in this set of 4 contains a completely different set of 150 puzzles, meaning this pack contains more than 600 unique suduko puzzles in total - plenty to keep you occupied! [Sudoku Books for Adults] - Fill each 9x9 grid with numbers so that each column, row, and each 3x3 box contain all the numbers from 1 to 9 in each. There are 150 exciting puzzles to complete in each adult activity book, and there's even a handy space where you can note down your start and finish times so you can compare how quickly you completed the puzzle [Large Print Puzzle Books] - Each sudoku book is printed in a large print typeface, so older people or those with certain visual impairments can enjoy completing them [Variety of Difficulties] - Each puzzle has a difficulty rating from Easy to Very Hard, so everyone can find a puzzle on their level. Solutions can be found at the back of each book [Compact and Environmentally Friendly] - These books are approximately 21x15cm each, and are made with eco-friendly recycled paper. They are also fully recyclable