Cammie Morgan may be a spy-in-training with a genius IQ, but there are still a lot of things she doesn't know. Like, does her ex-boyfriend even remember she exists? And why is her mother acting so strangely?

This semester at Gallgher Academy, Cammie just wants to lie low, but danger seems to follow her everywhere. When the principal plays host to some mysterious guests - code name: Blackthorne - she is blamed for a security breach that leaves the school at risk.

Cammie and her friends are determined to clear her name, but this time the targets are tougher (and hotter), and the stakes for Cammie's heart - and her beloved school - are even higher.

Special 10th anniversary edition, including an exclusive new epilogue.