Sudoku Ser.: Mega Sudoku 16x16 Large Print - Hard - Volume 59 - 276 Logic Puzzles by Nick Snels (2014, Trade Paperback, Large Type / large print edition) for sale online | eBay
Mega Sudoku 16x16 Ser.: Mega Sudoku 16x16 - 200 Normal Puzzles Vol. 2 by Liam Parker (2019, Trade Paperback) for sale online | eBay