Eye of the Tiger — Catherine Green

Jessica Stone used to be a normal human. Then she fell in love with a vampire, met his identical twin werewolf brother, and her life fell apart spectacularly. Meeting Detective Jack Mason, and his brother Danny, brought about a powerful change, and Jessica's magic was released. Now, in Redcliffe book 4, she must learn to control her ethereal animal familiar, who lusts after the alpha werewolf, and will stop at nothing to use her human mistress as a tool...

Or is that a weapon?

The Redcliffe novels series follow the adventures of bookshop owner Jessica Stone as she meets a man and falls in love, only to discover the hidden werewolf secrets of her close friends.

Who knew the Cornish coast could be so deadly?