For Your Ears Only - Emily Kazmierski - Bog

Keep your clients close, and your teammates closer.
Loveday's an international teenager of mystery, or at least she's about to be. When a private citizen tasks her team with their first international espionage mission, Loveday is thrilled. Her crew is ready. Well, mostly ready.
When their mission fizzles, Loveday starts tracking another lead: the origins of her adopted sister's biological family. What they find in Palermo stops them short: one of her teammates has done something they never suspected.
But the real kicker comes when Loveday discovers that he's not the only one who's lying, and this time, it puts the lives of her entire team at risk.