Super Sudoku X 16x16 | Sudoku, Magic squares, Coloring books
Large Print Sudoku 16x16 - 100 Hard Puzzles: Very Difficult Hexadoku with Solutions - Sudoku Variant Puzzle Book for Adults (Large Print Sudoku Variants): Hammond, Oliver: 9798701535297: Amazon.com: Books
16x16 Diagonal Sudoku X: Hard Mega-Sudoku X Puzzles: SomatoMint: 9798646509674: Amazon.com: Books
Mega Sudoku 16x16 - 200 Very Hard Puzzles vol.4 : Liam Parker : 9781688670440
Large Print Sudoku Variants: Large Print Sudoku 16x16 - 100 Medium Puzzles : Hexadoku Puzzle Book for Adults - Sudoku Variant Game (Paperback) - Walmart.com
Sudoku 16x16 Monster - Weekly Sudoku 16x16 Monster (Version with notes in comments) | Facebook