"With [DECLASSIFIED] new chapter inside!" -- Cover.
Previously published as "first hardcover edition, June 2010" and "first paperback edition, January 2012." -- Title page verso.
Summary
When a terrifying encounter in London reveals that one of her most-trusted allies is actually a rogue double-agent, Cammie Morgan no longer knows if she can trust her classmates, her teachers--or even her own heart.