Think Tank Cryptograms: High-Octane Puzzlers to Fuel Your Brain!

Anyone who loves to flex their mental muscle will find plenty of challenges in these collections of 40 crosswords, 132 cryptograms, 151 trivia questions, and 111 teasers. These highly portable bunches of riddles, diagrammed puzzlers, knowledge testers, and logic games provide go-anywhere cranial crunches for planes, trains, automobiles, or just passing the time.