16 x 16 Mega Sudoku Large Print: Perfectly to Improve Memory, Logic and Keep the Mind Sharp! (Paperback) | Midtown Reader
Sudoku Mega, Adobe Flash game by Shockwave (200?)
F*cking Hard 16 x 16 Sudoku: Mega Size Hard Sudoku featuring 55 Extra Large 16 x 16 Sudoku Puzzles and Solutions - Creative, Quick: 9781083037060 - AbeBooks
Sudoku Mega Bundle by GammaLateral LLC
Mega Sudoku 16x16 - 200 Normal to Hard Puzzles vol.6 by Liam Parker | Goodreads