I freaking LOVE these books. The first book caught me by surprise, but I loved it so much jumped on the second like a starving fledgling on a grasseater.
Because the Books of the Raksura contain some of the most original, exotic, and beautiful fantasy worldbuilding I've ever seen. Those of you who complain that there's nothing new in fantasy, read these. Here is plausible ecology and biology mingled with magic in a way that feels almost science fictional. Here are created, magical races drawn with believable complexity -- none of that essentialist "always chaotic evil" crap we're so used to seeing in fantasy, and plenty of diversity and history and mystery. That the Raksura resemble shapeshifting dragons is irrelevant; they're people, human without being human, and Wells does a marvelous job of treating these people as well-rounded and flawed characters whose struggles you can't help but care about.
In this outing, Moon -- recently and uneasily accepted into the Indigo Cloud court -- travels with the group to their ancestral home, where they mean to make a new start after nearly being destroyed by the Fell in the last book. They find a paradise of giant mountain-trees and forests that stretch for miles, waterfalls and plentiful game, and unearthly beauty. However, the seed which keeps their mountain-tree alive has been stolen, and Moon -- as the member of the group with the most experience at dealing with other races -- must help his new tribe track it down before the tree dies.
If there's any critique I have for these books, it's that the characters are sometimes sketched a little thinly -- but given how much time and attention has been given to the setting, I'm not sure that's really a flaw. My sense is that some of the thinness I feel is actually Wells trying to convey that the characters really aren't human. For example, Pearl's behavior frequently makes no sense (the other characters comment on it) until you realize that this is how queens are supposed to act; it's one of the ways they maintain dominance over others. The only reason we don't understand it is because Moon, a stranger to his own people, doesn't understand it. As he gains understanding, it all fits together.
Spoiler: I especially liked those chapters wherein Moon and Jade visit the Emerald Twilight court, and Moon must find a way to master consort etiquette -- when a just few months before he didn't even know the name of his own species. I also loved that we get to know more about characters who intrigued me in the first book: Flower the acerbic and grandmotherly mentor, Stone -- snarkier than ever in this outing -- and Moon himself. I love that we get to see a "real" solitary, and gain more understanding of why the Raksura are so suspicious of them. And holy crap, Jade. I love watching her play diplomat and maneuver her way through various politically-delicate scenarios, but there's a chapter near the end of the book in which she basically cries havoc and lets slip the claws of war, and it's beautifully bloody. I've always loved the treatment of gender in this series: women who are stronger than men and the men who love them for it; gender roles that are neither stereotypical nor simple reversals. All Raksura are formidable, but it's made very clear in this book that the role of a queen is to be the baddest mf on the planet. I see now why Moon loves her.
So read this book. And go tell your friends to read it, because I want it to sell well so we can get a third visit to the Three Realms.