Destiny's Past - Daughters of the Crescent Moon, #1

No-nonsense medical examiner, Kelly Richards, relies on the familiar comforts of science and scalpels to get her through the day. So when a not-so-dead guy who claims he's from the past lands on her autopsy table, she considers calling the men in white coats to escort him to a padded room. But Jarek's old-world ways and hot gaze trick her heart into falling for him-a mistake she swore she'd never make again.
When Jarek, Prince of Leisos, discovers someone he trusts has been slowly poisoning him, he travels to the future in search of a cure. Driven by vengeance, he enlists the help of an impudent scientist to return him to his time. As they try to find a solution, Kelly struggles with her feelings for Jarek while dodging the police and a visitor from her past. Caught between his growing desire for Kelly and the need to expose his would-be assassin before they strike again, Jarek must decide between forfeiting his ticket home or losing the only woman he's ever loved.