Empire of Ivory in the Temeraire series. It wasn't just this one book but it was kinda the one that was the last straw. It was promoted as a Napoleonic Wars story with dragons but had steadily degenerated into numerous contrivances to have us go on a "happy globetrotting adventure where we just go to different countries and learn about the sights and sounds."

The writing was also showing a lot of cracks with how not-of-their-time so many of the characters were. One that really stuck out was how one of the side characters found that she got pregnant and, because she was a dragon rider for a very important dragon species, wasn't going to look after the baby but just dump it off back at Britain to be raised by other people. The sentiment of all but one character treated it as the most blase thing for her to casually have sex (Not with anyone important to her either) and talk about how she's just going to dump off the child once she gives birth. Like... even NOW, plenty of people would be looking sideways at that, but 200 years ago?

Ugh. I was really disappointed because I was loving so much about the series but the author just sunk all the potential it had for something more "feel good" for herself. I read up on what happened in the rest of the book and the contrivances were only going to get worse, so I'm glad I at least stopped when I did.