Big Book Of Sudoku Medium To Hard 1000 Puzzles: Huge Bargain Collection Of 1000 Puzzles And Solutions, Medium To Hard Level, Tons Of Challenge For By Puzzles, Beeboo By Thriftbooks
Exceedingly Hard Sudoku Puzzle Book: 300 Insane Puzzles That Are More Difficult To Solve Than Einstein's Equations And For People Who Have IQ Above 18 By Hoshiko, Masaki By Thriftbooks
Big Book Of Sudoku Medium To Hard 1000 Puzzles: Huge Bargain Collection Of 1000 Puzzles And Solutions, Medium To Hard Level, Tons Of Challenge For By Puzzles, Beeboo By Thriftbooks