Have you solved enough Sudoku, crosswords, and logic problems to last a lifetime? Vietnamese puzzle master Lai Van Duc Thinh has created a series of fresh, original puzzle types that are sure to challenge and engage even the most experienced puzzle-solver, including Bar Code, Elbow Room, Boxing Match, Borderlands, and other novel formats. More than 100 puzzles are presented in this collection, and each type is explained and rated for difficulty. Puzzle master Will Shortz discovered Thinh Lai and published some of his original puzzles in the New York Times; here he provides a foreword introducing his brilliant work.