Extreme Sudoku Book Four: 100 Hard To Solve 25 x 25 Sudoku Puzzles With Solutions

100 very hard 25 number Sudoku puzzles. One puzzle on a page Using a 25 x 25 square grid. These puzzles are for expert Sudoku players. The solutions are in the back of the book. This is a Sudoku book for adults.

• | Author: Alexander Ross
• | Publisher: CreateSpace Independent Publishing Platform
• | Publication Date: Dec 10, 2017
• | Number of Pages: 132 pages
• | Language: English
• | Binding: Paperback
• | ISBN-10: 1981586083
• | ISBN-13: 9781981586080