Moonstruck (The Gwen St. James Affair)

Gwenevere St. James may be a lady, but she's never been interested in playing by the rules. Instead of ingratiating herself into high society, she spent a decade searching the world and studying the occult for a way to find her lost twin sister.

So when a coven of witches offers her a missing person's case in return for a book of spells guaranteed to locate her twin at last, Gwen cannot refuse, even if it means doing something she swore she would never do: attend a country party for the weal...