Ilona Andrews

A massive beast dashed along the mountain apex. Huge, at least six hundred pounds, the creature covered the distance in great leaps. The moonlight traced his gray mane and slid off the thick cords of his muscles. He was neither beast nor man, but a strange four-legged meld of the two, built to run despite his bulk.
How the hell did he even find me?
Atsany jumped up and down, waving his pipe. Without taking his gaze from the beast, Astamur reached for his rifle. “A demon?”
“No, not a demon.” I might have preferred one. “That’s my boyfriend."