Tamara

A terrorist doesn't let strangers in her flat because they might be undercover police or intelligence agents, but her children bring their mates home and they run all over the place. The terrorist doesn't know that a kid has bugged every room in her house, cloned the hard drive on her PC, and copied all the numbers in her phone book. The kid works for Cherub. Cherub agents are aged between ten and seventeen. They live in the real world, slipping under adult radar and getting information that sends criminals and terrorists to jail.

A group of professional detectives challenge Nancy to tackle a mystery that they have failed to solve: find an invaluable message hidden by a missionary, centuries ago in a hollow oak tree in Illinois. While searching the woods for the ancient tree, Nancy and her friends live with a group of young archaeologists who are excavating prehistoric Indian burial mounds on a nearby farm.