The Care and Feeding of Your Captive Earl by Kate McKinley
I loved that Gwen could drive Matthias bonkers, some of his reactions were entertaining, even though he was a clearly frustrated man, "Christ. Insufferable woman. “I would not feel compelled to broach such topics in a ballroom if you had seen fit to receive me when I’d called.” I loved this book, I found it entertaining and amusing. I loved Matthias and I loved Gwen even more.