Great Kids Academic Word Games: Mega Game Book Has Word Find Plus Sudoku Puzzles as Well as Jumbled Letters Intellectual Teasers for Brilliant Home Schoolers (Paperback)(Large Print) - Walmart.com
Sudoku Plus, Volume Two (Paperback) | Hudson Booksellers
Sudoku Primer 160 - Using the Sudoku 'Plus' Pattern to help you solve harder puzzles - YouTube