Book Cover: Aiden
Part of the Solitary Dragons series:

Griffin thinks he might be watching dragons through his binoculars while he's on a research project for his graduate program. He desperately wants it to be true, but he also wants to warn any dragons that might be up in the Sierra Nevada mountains that his professor wants to study them. He wants to help keep them safe.

Aiden has been solitary a long time when he inherits his aunt's daughter, who he calls his niece, through a terrible accident. He's not sure how to raise her or keep her safe, which seems even worse when Griff shows up. But then he realizes he and Griff are mates, and that he's not solitary anymore. Can he convince Griff they're meant to be together and keep the rest of the world, including whoever is watching them, at bay?