The Gentleman's Guide to Vice and Virtue

We've got grand tours on the Continent, we've got pirates, we've got a lady doctor, we've got a demented duke, we've got alchemy, we've got plenty of thievery, and we've got falling in love with your best friend ... what's not to like! This was a light, fun m/m romance that was heavier on the adventure story than the love story, with great characters who were complicated and not always what they appeared. The audio was excellent.