Dark Encounters of the Close Kind by I.T. Lucas — book slip

Gabi is determined to uncover the secret her family is hiding. Her suspicions grow when she learns her niece, a young prodigy, is engaged to an older man involved in a mysterious project. Upon visiting her family in L.A., Gabi discovers a world beyond her imagination: her family possesses godly genes, and her brothers and niece have already become immortal. To transition herself, Gabi must find an immortal mate. In a village of handsome immortals, her thoughts linger on Uriel, a man she met on her flight. Could he be a lost descendant of the gods, or is he part of an enemy faction? Gabi must navigate this new world of immortals, secrets, and potential love.

First in the Dark Encounters Trilogy of The Children of the Gods series.