DarkNight of the Moon by D.J. Jennings

He lurks in shadows and mystery at Camp Shifter, coming out only during DarkNight, the wild, bacchanalian free-for-all where anything goes.
Anything.
No one has seen him in the daylight, no one knows where he lives, no one knows his name–and the shifter nicknamed DarkLover by women, DarkDude by men, will do anything to keep it that way.

Andie Cumbington has been waiting her whole life for The Letter. One of the few shifters who is ecstatic about her newfound status, the chestnut-haired ballerina bear shifter arrives for her month at Camp Shifter with unbridled excitement. On her first DarkNight, she finds wild passion and–to her surprise–so much more, with a stranger who touches her heart as much as he lights up her body.

And then he’s gone, back into the shadows, hidden.
Exactly where he wants to be.
Craving his touch with an insatiable desire, Andie can’t let go. She always wanted the roll in the hay, but she never imagined the passion would be so intense.
Fate drives her to find love.
Then a simple errand turns into mortal danger for Andie, and an impossible choice as DarkLover must overcome his biggest fear in order to save the woman he loves.
But will it be too late?
—–

Welcome to Camp Shifter, where you’re about to change… in more ways than one.