Harry Houdini was the greatest escape artist in history, yet known to his contemporaries as a terrible stage magician. Nevertheless, in 1917 he performed a single illusion that has been hotly debated ever since: Under the bright spotlights of New York's Theatre Hippodrome, he made a live elephant disappear. Where did he learn this amazing trick and how did it work? The answers lie in magic expert Jim Steinmeyer's chronicle of illusionary innovation,...