A collection of 80 hard sudoku puzzles to challenge you by puzzle book creator Ginny Ayersman.
| Author: Ginny Ayersman
| Publisher: Independently published
| Publication Date: Aug 26, 2019
| Number of Pages: 100 pages
| Language: English
| Binding: Paperback
| ISBN-10: 1688624686
| ISBN-13: 9781688624689