Banned Books Week kicks off Sunday: Each year, the American Library Association takes this week to sponsor events all over the country to talk about the books that shock, offend and generally make Americans uncomfortable. That’s how a sex education book for children, titled It’s Perfectly Normal, became one of the most banned books of the past two decades. The book is meant to teach children 10 and older about sexual health, emotional health and relationships, and contains sections on puberty, pregnancy and sexual orientation.