“A Court of Silver Flames,” by Sarah J. Maas

Despite having liked the rest of the series, I was skeptical starting this book. It's got a different protagonist (Nesta instead of Feyre) and I had been told it was… very sexy, to say the least.

Both these things are true. I also enjoyed it immensely. Nesta' character arc will be something I can only hope to emulate as a writer.