Absolutely Nasty(r) Sudoku Level 4

By Frank Longo

Warning! Only the most skilled sudoku experts should try these mind-blowing puzzles!

In this series, you will find puzzles truly worthy of the label "hard." The four volumes of this series range from Level 1 to Level 4, increasing in difficulty with each book. At Level 4, even the fearless approach the mind-melters inside with trepidation.

• Format: Paperback
• Language: English
• ISBN: 1454970138
• ISBN13: 9781454970132
• Release Date: October 2026
• Publisher: Puzzlewright Press
• Length: 160 Pages