Witching Moon (The Moon Series, Book 3) by Rebecca York (2003)

Following the same lines as the last two books. Rebecca York has made another awesome book. This is Ross's brother, that is alike in the life style of he feels that he must stay alone not to hurt anyone else. Then he meets Dr. Sara Weston, and can not continue the attraction that begins. Little do Sara and Adam know that this is not a coincidence. Sara has been brought here on purpose, and Adam's gift may be the only thing that keeps them alive. ( )