Eternal Ecstasy (Guardians of the Realms #10)

*This is the finale of the Guardians and the Realms series and not meant to be read as a standalone title*
As the ruling God of Thule, Hroarr's priority is the survival of his world. Gifted with the ancient ability of sjá, he has seen the birth and destruction of hundreds of worlds. This incredible power comes at an enormous cost, yet its toll seems to ease in the presence of a hauntingly seductive healer from Earth.
Sirena’s life is comprised of duty. Duty to her Guardian family, to healing those of her world and, most of all, the overwhelming duty to right the wrongs of her secret and vile bloodline. With everything on her plate a ruthless warlord God from another world is the last thing she needs, no matter what fate and her heated body demands.
Will a dark Destroyer of Worlds bring upon the end of Earth and Thule or will two strong-minded beings fight and discover their own eternal ecstasy?