David Feldman. How Does Aspirin Find a Headache?: The Classic Reference to Life's Imponderables, Perplexing Riddles, and Humorous Science (Imponderables Series, 7). New York, Harper Perennial, 2005.

The seventh book in David Feldman’s bestselling Imponderables® series, packed with even more fun facts, answers to perplexing questions and solutions to everyday mysteries Instead of the aspirin bottle, reach for the most soothingly informative of David Feldman’s Imponderables® question and answer books, and find answers to the riddles that, whether you realize it or not, have been obsessing you since childhood, such as: What happens to the holes that are punched out of looseleaf paper? Why doesn’t beer come in plastic bottles? Do snakes sneeze? And, of course, How does aspirin find a headache? With more than 100 irresistible entries—submitted by his loyal Imponderables® readers—charming illustrations, and more than 100,000 copies sold in combined editions, How Does Aspirin Find a Headache? is an Imponderables® classic.