Naked Heat by Richard Castle

It's always nice when a literary series follows the cinematic version. If I didn't watch the show, I don't know that I would have finished the book but I liked hearing the voices of Castle and Beckett in my head and thinking about that character writing this book.
Heat is pissed off at Rook for the profile he wrote about her. But they run into each other again when the famous Cassidy Towne, gossip columnist, is murdered. Rook had been interviewing Cassidy and seems to know more about her than almost anyone, especially her extensive list of enemies. That list includes almost anyone famous in the upper echelon of New York, baseball players, chefs, and the like. The sex that's missing in the TV series (so far) is definitely available in this book.

Love Letters from a Duke by Elizabeth Boyle

Mistaken identity to the extreme. Felicity Langley thinks the handsome man on her front porch is the new footman, not her presumed fiance. While she falls more and more in love with him, the Duke of Hollindrake is trying to figure out if she's really the woman she seems to be, not the schemer he had first believed (his grandfather had corresponded with Felicity making her believe that she was engaged to the current duke which he doesn't know about.