Will Shortz Presents Devious Sudoku: 200 Very Hard Puzzles
Watch out! These puzzles are going to make you sweat. Includes: -200 very hard puzzles-Perfect portable size-Edited by Will Shortz More »
Watch out! These puzzles are going to make you sweat. Includes: -200 very hard puzzles-Perfect portable size-Edited by Will Shortz More »