Ultimate Sudoku: 600 Challenging Puzzles: Vol 1 :Boost your brain power with fun and addictive sudoku puzzles.The Huge Book of Sudoku: 600 Challenging Puzzles

by Charlie Max Paperback details (USA). ISBN: 978-1-0756-2831-3 ISBN-10: 1-0756-2831-8 Independently published · June 2019