"Missing Mate" is the third book in the O'Neil Pack series. Jessica Salone had a one night stand that resulted in twins. Years later, a hereditary issue arises. The only way to help her son is to get in touch with his father, who doesn’t even know the twins exist. Facing her regrets head on, she takes her twins to the resort where it all started. Will Alexander reject them? Will Jessica find the answers she needs? Or will she be thrown into a world of the unknown. Alexander Jamison is trying to find information as to why unknown shifters have been in the area. When he hears that a woman called asking questions, he is suspicious. Is something in his past catching up to him? Could the timing be a coincidence, or is there something more sinister going on?