Double Samurai Harakiri Sudoku: 99 overlapping sudoku puzzles, 8 sudoku grids in each puzzle: Djape: 9798563828346: Amazon.com: Books
SUICIDAL SUDOKU PUZZLE BOOK: 300 Hard Puzzles That Will Either Tempt You To Cheat Or Find The Suicide Forest In Japan And Perform Harakiri: Hoshiko, Masaki: 9781091713444: Amazon.com: Books