Book Title: Ultimate Sudoko: Classic, Irregular, Multi, Odd/Even, Diagonal, Sum 2018 Boxed/Daily Calendar (CB0270)
Publisher: Sellers Publishing, Inc.
Author: Conceptis Puzzles
Ultimate Sudoku provides hours of entertainment while sharpening your mind. With a mix of puzzle variations to challenge all levels, such as IRREGULAR, DIAGONAL, and SUM SUDOKU, each page provides a unique puzzle to solve. Ultimate Sudoku is the perfect calendar for those who enjoy testing their puzzle skills and strategies.