This is Book Four in the Lilith Mercury, Werewolf Hunter Series.
Peter was Lilith's first love--and the first person to call her a monster. Despite their past, Lilith would save him if she could, but when Peter is infected with lycanthropy and becomes determined to challenge Marco for the position of lupinus regalis, wolf king, she faces a hard choice.
There will be multiple partners in this series. If that offends you, turn back now.
Warning: This book contains graphic sex, graphic violence, and graphic language. No werewolves were harmed in the making of this book.