
Publications International, Ltd.
Brain Games - Sudoku #1

PAPP
R&R Pocket Sudoku Puzzle Books, Compact Travel Size Sudoku Books - Ideal for Relieve Stress, Boost Your Mood, Relax at Home and Office Breaks

Puzzlewright
Amazing Sudoku Variants

St. Martin's Griffin
Will Shortz Presents The Epic Book of Extreme Sudoku: 300 Challenging Puzzles

St. Martin's Griffin
Will Shortz Presents The Huge Book of Hard Sudoku: 300 Challenging Puzzles

Workman Publishing
Genius-Level Sudoku: Over 300 Super-Difficult Puzzles from the Japanese Masters Who Invented the Game

Workman Publishing Company
Expert Sudoku

Original Sudoku Page-A-Day Calendar 2024: 366 Puzzles From the Editors at Nikoli

St. Martin's Griffin
Will Shortz Presents Hard Sudoku Volume 5: 200 Challenging Puzzles