Immortal (Montague & Strong, #23)

Killing an immortal is easy…once you know how.

Simon’s past has returned, and she wants him dead.
Rejected by the Blood Hunters, Esti is looking to settle a debt against Simon and to do that, she’s joined another group of vampire killers.

The Heretics of the Sanguinary Order.

The Sanguinary Order have given Esti control of an ancient creature—designed to negate magic—along with a stolen weapon created to kill immortals.
Joined by Dira--a successor to the Marked of Kali--Esti plans to destroy Simon Strong, filling his life with agony, before she ends him.

Now, together with Monty, Simon must find a way to stop a group of fanatical killers intent on his destruction, all without help from Kali, the goddess who created this mess in the first place.