His Secretive Lover (The Thorpe Brothers #3)
Elizabeth Lennox

Unfortunately, she hates to steal, lie and cheat. Her father has disowned her because she refuses to help him, her family has turned their backs on her and she’s perfectly happy living a normal life as an accountant. Well, except for the occasional need for the adrenaline rush. Cricket admits it, she’s an adrenaline junkie. And she only steals ball point pens. Okay, and she occasionally does something to the big boss just to irritate him. But in her defense, he’s a supremely bad boss.
When one of Ryker’s clients talks about his frustration with someone breaking into his offices on a regular basis, Ryker immediately recognizes the woman’s figure. Because he watches her walk into the building every morning. When he accepts the assignment of his client to help track down the culprit, he has a fantastic time sweating out the beautiful cat burglar/accountant.