Book 3 of The Knights of the Twisted Tree.
The Knights may be gone, but their secrets remain. Those secrets could be the answers that Korin and Ádan so desperately seek, or–in the wrong hands–they could destroy everything. But they aren’t the only ones looking for the key to the power the Knights held for so long.
Archwizard Sheluna sends her apprentice, Samir, south to find what he can. At his side, in the guise of a common guard, Varajas goes along to make sure Samir doesn’t uncover anything he shouldn’t. But unbeknownst to both of them, there’s a third power turning its eye towards the lost power of the Knights, and its agent knows Varajas–knows who he is and what he’s done.
Some secrets are meant to stay buried. And some magics are too dangerous to be set free.