My Squares Are Not Enough! The Sudoku 16x16 Challenge for Adults with 242 PuzzlesPaperback, 20 September 2017

Why should you invest ample time and effort in playing Sudoku? Because of the benefits, of course! Sudoku can be a personal or shared experience and the range of benefits would remain the same. Your problem solving and pattern detecting skills will improve. You'll learn to look forward and problems as a whole. There are so many positive lessons to learn from a single book of Sudoku.