The Crosswords Club Collection returns with more of the puzzles enjoyed by the subscribers of the exclusive mail-order service that provides original Sunday-siz

Seventy-five new brainteasers are gathered here by the world's top puzzle creators.

Get your brain working with 200 grid-based logic puzzles from the Puzzle Baron! Filled with complex and fun brain teasers that range in difficulty, this book wi

A collection of brain teasers, puzzles, optical illusions, IQ tests, trivia challenges, and math tests designed to help people improve their brain power.

Think ordinary conundrums are just too humdrum? Do you finish crossword puzzles in ink and in no time flat? Then get ready for a serious test of your skills, wi