I was given a copy from the author, and it did not disappoint. It's even longer than Ghost Walk somehow, and for good reason. This book is full of character development and history, and it takes care to give each character their time in the spotlight.
I'll repeat the sentiment I saw from a friend: after reading this book, Ghost Walk feels like it picked up in the middle of a story. This isn't a bad thing, but Moon and Flame ends up feeling like where it should have all began (and where I suppose it now does). Moon and Flame is almost a necessity for those who love the series because of the gaps it fills in and the histories it brings to light.
As always, Solo writes characters very, very well. Some of the passages were beautifully written, and it was wonderful to see part of the story from Adelaide's perspective, as we only get Maaya's in Ghost Walk. The alternating chapters made things interesting and left very little downtime. We see familiar faces and plenty of new ones, and a completely seamless transition from this book into Ghost Walk. It had plenty of very emotional moments, and this book again proves that this series is not afraid to deal with serious subjects, including (if not especially) death, but happily jumps from gut-wrenching misery to cheerfulness and humor. I do like that its dark and emotional moments are allowed to settle only long enough to let you truly feel them before the story brings you back with levity.
This was a beautiful addition to the series with beautifully written characters, many overlapping story arcs, and a satisfying ending that sets you up perfectly for the next book. Overall, a great read that shows what can happen when an author takes care of her characters.