This taut romantic suspense novel from RITA Award–winner Stuart (The Widow
) delivers deliciously evil baddies and the type of disturbing male protagonist that only she can transform into a convincing love interest. Chloe Underwood, a 23-year-old American who regards herself as a disappointment to her high-achieving family, makes a meager living in Paris by translating children's books into English. After accepting a last-minute translating job in the French countryside, she discovers that rather than working for a consortium of food executives, she's stumbled upon a group of sadistic international arms dealers. Cold-blooded assassin Bastian Touissant, who was sent a year earlier by a nebulous "the ends justify the means" agency to infiltrate this shady group and try to stop its illegal activity, seems to blend right in. On meeting Chloe, Bastian isn't sure whether she's a spy, perhaps sent to kill him, or the innocent she appears to be. Despite his ruthlessness, Bastian can't resist saving Chloe's life (on multiple, graphic occasions) and attempting to send her back to her family in the U.S. Brilliant characterizations and a suitably moody ambience drive this dark tale of unlikely love. Agent, Jane Dystel. (May)