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Frank Longo

About the Author

Frank Longo is a freelance puzzle creator who lives in Hoboken, New Jersey. He has had more than 3,000 puzzles published since 1993 and written many books for Sterling, including Master Ninja Sudoku, Beyond Black Belt Sudoku, and Beach Blanket Sudoku, as well as crossword books. He is known for being able to produce sudoku that are diabolically difficult, yet fair, requiring the solver to use advanced techniques not found in typical newspaper and magazine puzzles.

Lotsa Cryptograms

Lotsa Cryptograms

Skill Builder Sudoku: Easy to Medium

Skill Builder Sudoku: Easy to Medium

by Peter Gordon, by Frank Longo

Skill Builder Sudoku: Medium to Hard

Skill Builder Sudoku: Medium to Hard

by Peter Gordon, by Frank Longo

Skill Builder Sudoku: Hard to Expert

Skill Builder Sudoku: Hard to Expert

by Peter Gordon, by Frank Longo

Pause for Puzzles: Sudoku for Mindfulness

Pause for Puzzles: Sudoku for Mindfulness

Sudoku Puzzles for the Weekend

Sudoku Puzzles for the Weekend

Blockbuster Book of Sudoku

Blockbuster Book of Sudoku

Way Beyond Black Belt Sudoku®

Way Beyond Black Belt Sudoku®

mental_floss Sudoku

mental_floss Sudoku

Puzzlewright Guide to Solving Sudoku

Puzzlewright Guide to Solving Sudoku

by Frank Longo, by Peter Gordon

The Nastiest Sudoku Book Ever

The Nastiest Sudoku Book Ever

Beyond Black Belt Sudoku

Beyond Black Belt Sudoku

Poolside Sudoku

Poolside Sudoku

Third-Degree White Belt Sudoku®

Third-Degree White Belt Sudoku®

Third-Degree Brown Belt Sudoku®

Third-Degree Brown Belt Sudoku®

Third-Degree Black Belt Sudoku®

Third-Degree Black Belt Sudoku®

Absolutely Nasty® Sudoku Level 2

Absolutely Nasty® Sudoku Level 2

Absolutely Nasty® Sudoku Level 3

Absolutely Nasty® Sudoku Level 3

Absolutely Nasty® Sudoku Level 1

Absolutely Nasty® Sudoku Level 1

Absolutely Nasty® Sudoku Level 4

Absolutely Nasty® Sudoku Level 4

Second-Degree Green Belt Sudoku®

Second-Degree Green Belt Sudoku®

Second-Degree Brown Belt Sudoku®

Second-Degree Brown Belt Sudoku®

Second-Degree Black Belt Sudoku®

Second-Degree Black Belt Sudoku®