Shadows Strike was a stellar addition to the Immortal Guardians series by Dianne Duvall. Heat, intense action scenes and strong characters had me completely immersed in this world. Shadows Strike is the sixth novel in the Immortal Guardians series and can work as a standalone, although there is an overall story ARC between good and evil. I started this series with the fourth book and will eventually start at the beginning. *glares at TBR pile*