Here are some other books that have danger, intrigue and some romance (or at
least flirtation!)
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.