Book excerpt: 60-Second Brain Teasers Pencil-Free Puzzles contains 201 no-pencil-required brain twisters that take one minute or less. These completely original puzzles range from easy to near-impossible! At your home, on the commuter train, or in your doctors office-whenever you have a minute or two, challenge your brain with these ingenious brainteasers! Nathan Haselbauer's amazingly clever book of 201 pencil-free brain teasers isn't your typical puzzle book. 60-Second Brain Teasers Pencil-Free Puzzles is the perfect distraction for puzzle lovers with only a few minutes to spare. Pit your wits against puzzles like: A car dealer spend.