Mega Sudoku 16x16 - Hard to Extreme: Large Print Sudoku Puzzle Book for Advanced Solvers, Extreme Sudoku, Improve Your Memory

This book has 100 Hard and Extreme Sudoku 16 X 16 Puzzles. Challenge yourself today with Sudoku Hard & Extreme Level Puzzles!
Sudoku is a fun and addicting logic puzzle game for improving your memory and prevent neurological disorder.
This book is ideal for advance solvers, will love to solve this difficult Mega Sudoku 16x16 puzzles. Only 1 print per page. It is also ideal for those wanting to move on from the "Medium" difficulty level and try a more challenging set of puzzles that require some advanced solving techniques.\nFeatures: \n50 Hard Level / 50 Extreme Level
Large Size: 8.5 x 11 inches
Premium glossy cover
Easy to read
Solutions included\nThis book is the perfect size for traveling so feel free to take it on the go with you!