Here’s a nice book to pass the lazy days of summer!
You can get 57% off the regular price of Big Book of Sudoku: Over 500 Puzzles & Solutions at Amazon.
Description:
You don’t need to be a math whiz to enjoy a great sudoku puzzle! Sharpen your mind and have some fun with this great collection of sudokus, including over 540 challenges across four difficulty levels (Warm-Up, Challenging, Tough, and the ultimate Samurai Sudoku!) A must-have for all Sudoku enthusiasts.
Ships free with Prime or orders $25+