There's something dangerous on the prowl at the San Diego Zoo in this latest addition to the beloved A to Z Mysteries Super Editions! Can you SPOT the mystery? Dink, Josh, and Ruth Rose are visiting the San Diego Zoo. When a rare amur leopard goes missing, everyone is a suspect! Can these expert clue hunters find out how the leopard got loose? Help Dink, Josh, and Ruth Rose solve mysteries from A to Z! From The Absent Author to The Zombie Zone , there's a mystery for every letter of the alphabet, plus super editions with even more A to Z fun. And don't miss Ron Roy's series for younger readers, Calendar Mysteries!