I'm not going to print it, because a person who emails me should not have to expect that his private message is going to be published on even this tiny public forum. But I'll summarize: Fat Vampire is smut. The emailer went to his daughter's principal and convinced her to remove it from the school library. He promised to tell everyone about Fat Vampire and requested, in the future, that I please keep my books out of schools.
The following was my response. I have not yet heard back.
I regret that you were offended, [Name Redacted]. And in monitoring your daughter's reading and requesting that she refrain from books you don't find appropriate you were doing exactly what all parents should do, if they're able. You'll understand if I don't agree with censorship, however. The other parents at your daughter's school also have the right (some would say responsibility) to regulate their kids' reading, and you've taken that right away from them.
I think you're mistaken about my role in all this. I didn't put my book in your school, nor do I decide where they're sold. I merely wrote a story I wanted to write, and was grateful that my publisher published it. Ultimately my publisher is the entity that decides how my book will be marketed, as well, and with thousands of Young Adult titles to their name they decided that my book, too, is a Young Adult title. Mind you, I'm not saying I disagree, though I tend to describe it as a Teen/Adult title myself (which essentially amounts to the same thing). Regardless, I don't put my books in your or any other school, so I can't be entreated to keep them out. You could only ask me to stop writing, and to that the answer's no.
I don't envy you your task these next few years–you're going to have to be very vigilant. If you consider my book to be smut then you'll find that there are a great many Young Adult titles that are just as bad, and a fair number that are worse. Anyway, though I don't like book-banning I defend your right to tell anyone and everyone you know just exactly how you feel. You may want to temper your enthusiasm, however, with the knowledge that it's a rare censorship campaign that doesn't increase a book's sales.