Here's an article that talks about that: http://enjoyparenting.blogspot.com/2008/07/using-childrens-books-for-difficult.html
It suggests the books by Marc Brown. He wrote a series of books with Laurie Krasny Brown called the Dino Life Guides for Families. They have books on divorce & death as well as talking about sex with young kids. It really does depend on the topic you need- you can find almost anything on the internet and I'm sure if you check with your local library children's department they would be more than willing to help you.
at 12:58 AM on Jan. 26, 2009