Feyre returns to the Spring Court after surviving Amarantha and Under the Mountain, but instead of being left to a happy life with Tamlin, she must abide by the bargain she made with Rhysand and live part time at the Night Court. As she explores her new Fae powers, larger evil looms over Prythian. 

You were all right, this book is way better than A COURT OF THORNS AND ROSES, which I had thoroughly enjoyed! The Fae world expands intricately here, and new sets of characters bring depth and history to a world that was previously quite limited. 

And I have to say, I thought Tamlin was kind of a cipher/generic handsome hero in the first book, and I'm glad to be vindicated on that point. Even then, I was not expecting to come to like Rhysand as much as I did. I'm very much looking forward to reading the third installment!