Shades of Magick - Daughters of the Craft, #1

The good, the bad and the Grey.Kalista Blackthorn is one of three Grey Witches attending the prestigious Kingsbridge University, a place where supernaturals blend in with unsuspecting humans. When female co-eds begin to go missing, it's quickly apparent that a supernatural is responsible. Everyone is a suspect, even the ancient warrior that Kalista is unnaturally compelled towards. Ragnar ignites the darkness in Kalista that she has been desperately keeping at bay since she was a young girl.
Their romance seems doomed before it even starts, but some bonds even death can't erase. Soon, it becomes clear that the witches are being blamed for the women's deaths. Can they find the killer and clear their names? Or will the dark power threatening everyone on campus destroy them all?