The Lost Kingdom — Hal Emerson

AmyQuinn Stonewall, Samson Seastrider, and Wren the thief have returned to Var Athel under the watchful eye of Valinor Therin. After defeating a Kull on the hills of Aginor, word of their victory has spread, though the details remain hidden, as do their identities.

Now, Valinor plans to take them out of the Tower to an exiled Sorev Ael who will help them learn to harness their newfound powers. But the Circle that rules Var Athel must not know - for they are tasked with keeping Aeon safe, even at the cost of innocent lives.

Torn apart by mixed loyalties and bound together by the gift of Eryn-Ra blood, Valinor's three apprentices must find a way to control their power and save themselves.

Because the blood is both blessing and curse - and it will kill them if it cannot be controlled.