3600 Sudoku Puzzle Book Activity Book For Adults Sudoku Adult Puzzles Book | Adult Books Paperback: 3600 Sudoku Puzzles For Adults Easy Medium Hard Level

US Letter 8.5x11 inches Format.Premium Matte Cover Design.Suitable for all Levels Beginner to Expert.Complete Answers for Each Puzzle.Sudoku Brain Game Puzzle Book help enhance the following cognitive functions:Problem solvingGeneral knowledgeAttentionCreative thinking,Language,Visual search