If you like I'd tell you I love you, but then I would have to kill you by Ally Carter
Here are some other books that have danger, intrigue and some romance (or at
H.I.V.E. Higher Institute of Villainous Education by Mark Walden.
Swept away to a hidden academy for training budding evil geniuses, Otto,
a brilliant orphan, Wing, a sensitive warrior, Laura, a shy computer
specialist, and Shelby, an infamous jewel thief, plot to beat the odds
and escape the prison known as H.I.V.E.
Thieves Like Us by Stephen Cole.
A mysterious benefactor hand-picks a group of teen geniuses to follow a
set of clues leading to the secrets of everlasting life, secrets which
they must steal and for which they risk being killed.
The Thief by Megan Whalen Turner.
Gen flaunts his ingenuity as a thief and relishes the adventure which
takes him to a remote temple of the gods where he will attempt to steal
a precious stone.
Tomorrow When the War Began by John Marsden.
Seven Australian teenagers return from a camping trip in the bush to
discover that their country has been invaded and they must hide to stay
Code Orange by Caroline Cooney.
While conducting research for a school paper on smallpox, Mitty finds an
envelope containing 100-year-old smallpox scabs and fears that he has
infected himself and all of New York City.