Tempting the Thief by Riley Cole

An adventurous thief runs headlong into a reluctant earl. Happily ever after is going to be…complicated.

Reformed thief Briar Sweet treasures her life chasing down criminals with the Restitution League, but she can’t help wishing for a love of her own. Desperate for change, she dives into an intriguing new case that offers mystery, adventure, and an irresistible earl she has no business kissing.
Nathan Sheppard’s life stopped the minute he inherited the title. No more fun. No more adventure. Just one stultifying gala after another. Until a beautiful thief barrels into his life, pursuing a blackmailer intent on harming his niece. Strong, self-assured, and deadly with a throwing knife, Briar is everything he desires, but he has no business dallying with a dangerous, delicious woman who out maneuvers him at every turn.
Together, they chase a murderous blackmailer through the satin-filled ballrooms of London, but the real threat is to their own stubborn hearts. Can desire outwit duty before a killer strikes again?
Meet the Restitution League– They’re thieves. They’re rogues. They’re well-armed for adventure. The crew of the Restitution League fights injustice while wrestling with love and desire and the occasional throwing knife. One blazing romance at a time…