i don't know if this book has been mentioned
water for elephants by sarah gruen very good book , romance, murder, and ends with a happy ending. waiting for it to become a movie.
Sara Gruen - Water for Elephants
the historian- elizabeth kostova - this book keeps freaking me out so it's taking a long time to finish it. if you're interested in vald the impaler i recommend it.
for young adults
if your into romance and vampires twilight by stephanie meyers is a good one.
the black tattoo by sam enthoven- it's about a boy who has to save his friend from hell. theres a lot demon fighting action.