When grad student Morgan Leviss chose sexual surrogacy for her thesis, she never expected to become one. Now she's tasked with turning two reclusive men into social creatures. Zac Blackstone and Aiden Goldman are nothing like what she expects. Handsome and charming, they're a puzzle she finds intriguing.Zac and Aiden have known each other for over two hundred years. Part of a cadre of shifters, they're on a mission to mate and procreate. Powerful...