5 levels of difficulty - from beginner to mind-benders
Sudoku grids that are large, easy to read, and fill out
An answer key for those puzzles that leave you stumped
Spiral-binding for ease of use
192 pages
Part of the popular Brain Games series, designed to help keep your brain cognitively fit, flexible, and young. Boost your concentration, logic, and reasoning and lower your brain age in minutes a day!