Sudoku 25x25 Vol III : Volume III by Sanket Sarang
Giant Sudoku Puzzles: With solutions: 25X25 Puzzle Grid: Combined Alphabet letters A to P and Numbers 1 to 9 (Large Print / Paperback) | Klindt's Booksellers and Stationers
Alphadoku image example, 25X25 sudoku puzzle, asymmetric, expert No. 10000.
Sudoku 25x25 50 Giant Medium Sudoku Puzzles by Jacob James