This is book 7.

Taylor fights to survive in a hostile world that wasn’t even created for humans. As she tries to navigate the netherworld, she looks for an ancient necklace that will stop the war between the witches and werewolves. Things only get worse when she crashes on a mysterious island with supernatural creatures that want her dead. She strikes a deal with her immortal husband to rally support for the fey war and help him with a curse placed on his family if he grants her a divorce. She attends fancy parties and speaks for the cause, uniting all supernatural creatures to fight the fey as one. Can Taylor ever get her life back? Or will it continue to spiral out of control?