PAWN by Timothy Zahn

Reviewed over at Tor.com:

I’ve read quite a lot of Zahn’s work, and I’ve come to the conclusion that he’s at his best when he can play in other people’s sandboxes. His original work often feels shallow by comparison, the details of the worldbuilding barely sketched, and the characters not so much shaped by their environments as floating through them.

This is unfortunately true of Pawn, too