Crossover Cover: The Problem of the Elusive Cracksman

This issue of The Magazine of Fantasy & Science Fiction includes "The Problem of the Elusive Cracksman" by Ron Goulart. Harry Challenge deduces the gorilla-like thief who stole the Mirabilis Diamonds took a serum that could turn an average man into a large, powerful superhuman. Challenge’s sidekick, the Great Lorenzo, recalls that a fellow named Dr. Henry Jekyll stumbled upon a similar concoction some years ago, and came to a bad end. Win included several Harry Challenge stories in the original Crossovers, and the Jekyll connection further cements Challenge in the CU.