So You Think You've Got Problems?: Surprising and rewarding puzzles to sharpen your mind

Think Twice: Simple puzzles (almost) everyone gets wrong

Alex Through the Looking-Glass: How Life Reflects Numbers, and Numbers Reflect Life

The Language Lover's Puzzle Book: Lexical perplexities and cracking conundrums from across the globe

Alex's Adventures in Numberland: Dispatches from the Wonderful World of Mathematics

Futebol: The Brazilian Way of Life - Updated Edition