One part "The Da Vinci Code" and one part "Twilight", this novel kept me reading long into the night to see what happens next. Romance fans will appreciate the love story more than I did, but it was the secret world of witches, demons, and vampires that really grabbed me. Harkness (herself a historian) swirls magic and history into one delicious mixture of mystery and danger. I also really enjoyed the use of medieval alchemy books and emblems. I would have liked the alchemical illustrations to be recreated in the book itself, but I guess you can't have everything.