Sharon Shinn 
Turning Season [EPUB ebook] 

For Karadel, being a shape-shifter has always been a reality she couldn’t escape. Even though she’s built a safe life as a rural veterinarian, with a close-knit network of shifter and human friends who would do anything for her, she can’t help but wish for a chance at being normal.When she’s not dealing with her shifts or caring for her animal patients, she attempts to develop a drug that will help shifters control their changes — a drug that might even allow them to remain human forever. But her comfortable life is threatened by two events: she meets an ordinary man who touches her heart, and her best friend is forced to shift publicly with deadly consequences.Now Karadel must decide whom to trust: her old friends or her new love.