Additional information
by Frank Longo (Author)
Gluttons for punishment rejoice! The popular series of ultra-hard sudoku is back.
Just when it seemed safe to go back into the puzzle section of the bookstore ... here comes another collection of the hardest sudoku known to humankind. The newest four volumes of this bestselling series range from Level 1 to Level 4, increasing in difficulty as they go. In Level 3, solvers will encounter 242 puzzles requiring some of the trickiest expert techniques. It might seem unbelievable that harder sudoku than these exist, but they do: in Level 4!Author Biography
Frank Longo creates, fact-checks, and edits crossword puzzles, and also specializes in sudoku, having published more than 150 sudoku books. His books have sold more than 5 million copies. His wide array of titles encompasses both standard and variety sudoku puzzles, and includes Beyond Black Belt Sudoku, Way Beyond Black Belt Sudoku, The Nastiest Sudoku Book Ever, Pause for Puzzles: Sudoku for Mindfulness, Sip & Solve Simple Sudoku, Blockbuster Book of Sudoku, Puzzlewright Guide to Solving Sudoku (with Peter Gordon), and Skill Builder Sudoku (with Peter Gordon).
Number of Pages: 160
Dimensions: 0.42 x 8.5 x 6.05 IN
Publication Date: May 05, 2026
