Having escaped the enemy for the moment, Cantra, Jela, and the Tree have to make some big decisions--the first of which is whether they're sticking together while Jela keeps his promise to Rool Tiazen and his lady, to get and distribute Liad dea'Syl's equations that hold the only hope of defeating or escaping the Sheriekas. Once they're all committed, things start to go a little haywire. Liad is inside a scholars' tower, Osabei, on Landomist. It's an inner world, and has harsh laws about the genetically engineered, like Jela. Getting in to Osabei is going to take Cantra taking on a whole new identity--and believing it, right down to the core. Jela knows why they're there; Cantra doesn't even know who they really are.
And the Sheriekas are still after them, and there's an enemy from Cantra's past inside, and then Tor An yos'Galen young Trader pilot whose home star system has just been destroyed by the Sheriekas, shows up looking for an old friend of his grandmother...
As they gather their allies and their enemies close in, Jela, Cantra, and Tor An all learn unsettling things about themselves, their own pasts, and what they're really willing to do. The Tree, too, is learning, sharing its ideas via images, and engaging in unauthorized biopharmacology without prior discussion.
The Great Migration is about to happen, if they can live long enough, and get enough of the human species moving.
This is another enjoyable Liaden adventure, and some of the fun in this one is recognizing people and things that will be important in the history of the chronologically later books and stories.
I bought this book.