In The Creeper Code, the very first book in this mystery series, Oliver and Audrey learn there’s a reward for tracking creepers and cracking cases. From secrets in the swamp to bungles in the jungle, there are mysterious happenings in every block of the biome. But with Oliver’s eye for detail, Audrey’s courage, and their wolf-dog’s super-sniffing nose, no case is too tough for these twins to crack. Ages: 7-12.
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