The Edge of Worlds by Martha Wells

“In the beginning of this new full-length entry in Wells’s Raksura series (following 2012’s The Siren Depths), the entire community of Indigo Cloud, home to a shape-shifting race called the Raksura, has a nightmare of their world being destroyed by their archenemies, the predatory Fell. To prevent that, Jade, Moon (her consort), and other Raksura must join a group of archaeologists from several races to investigate an ancient site that could destroy them all…When the Fell do show up and bring a new wrinkle to their characterization, the dramatic battles, tough decisions, and character dynamics shine through. Filtering the story mostly through the semi-outsider Moon, Wells overcomes pacing flaws to keep this series going strong with an imaginative world of engaging characters.” — Publishers Weekly