Books like The Inquisitor's Mark by Dianne K. Salerni

After the devastating Eighth Day war in Mexico, Jax, Riley, and Evangeline go into hiding, pursued by rogue Transitioners and deadly Kin lords intent on exploiting Riley’s descent from King Arthur and Evangeline’s powerful Merlin‑bloodline. When Finn Ambrose, a mysterious stranger, contacts Jax claiming to be his uncle, Jax’s defenses are put to the test—especially as Finn reveals he is holding Jax’s best friend Billy hostage. Determined to rescue Billy and keep Riley and Evangeline out of the danger, Jax alone steers toward New York City. There he uncovers a shocking truth: Finn is indeed his uncle, and Jax is closely related to the Dulac clan, a notoriously corrupt and perilous family of Transitioners eager to seize Riley and Evangeline. With family ties and enemies alike willing to do whatever it takes, the stakes for the trio have never been higher.

First publish date: 2015