Nothing good will come out of falling in love with a dead person. Whether you can't actually touch them, no one else can see them or they just want to eat you, the cons far outweigh the pros in this situation.
I don't give books star ratings; I give them bite ratings. This is a bite. A book can get up to five of these evil-looking chompers, including half bites.
You can attribute your own wording to the ratings. Five's the best, three's decent, one and under isn't worth the gas to go to the library. I'll leave it to you to fill in the blanks.