Frank Longo is a freelance puzzle creator living in Hoboken, NJ. While he has had over 3,000 crossword puzzles published since1993, he has been focusing on the sudoku craze for the past several years. He has published nearly 100 sudoku books, with awide variety of titles such asThe Official Book ofWordoku#1, #2,and#3;Oy Vey! Sudoku; 10x10 Sudoku;Absolutely NastySudoku Level 1, 2, 3, and4;The World's Longest Sudoku Puzzle;The Sudoku Code(coauthored with Francis Heaney); andPuzzlewrightGuide to Solving Sudoku(coauthored with Peter Gordon). More thanfivemillion puzzlebooks by Frank Longo havebeen sold.