2026 Reading Challenge

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Are you Frank Longo, author of the books below?
Absolutely Nasty Sudoku Level 4 by Frank Longo Beyond Black Belt Sudoku by Frank Longo Absolutely Nasty Sudoku Level 1 by Frank Longo Absolutely Nasty Sudoku Level 2 by Frank Longo Absolutely Nasty Sudoku Level 3 by Frank Longo Second-Degree Black Belt Sudoku® by Frank Longo mental_floss Sudoku by Frank Longo Third-Degree Green Belt Sudoku® by Frank Longo Third-Degree Black Belt Sudoku® by Frank Longo The Official Book of Wordoku by Frank Longo


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