Carpathian Vampire: When You've Never Known Love by Lumi Laura, Richard Sheppard
Teenage Alexandra Eidyn had no suspicion that her annual trip to Grandmother's house to spend the summer would this time destroy her plans to attend Oxford University in the fall and instead propel her into the World of Vampires and eventually to the gates of Heaven and Hell. On the way, she'd fall in love - something she'd come to think wasn't even possible for her - with two people, become a fugitive from justice, and be a casualty of the Church to which she'd turned for help. She falls into a vampire society she never knew existed but that has been waiting for her the last ninety years, and learns that the Divine World has prophesied of her coming for millennia. All this following her grandmother's revelation of a family connection to royalty that has been kept secret for generations.