This book never fails to make me cry, make me sick to my stomach and want to kill this poor child's mother. But I think everyone should read it, just to know how horrible child abuse is and that these things really happen to innocent children.
Millennium Trilogy by Stieg Larsson. I usually don't read this type of book but I read "The Girl With the Dragon Tattoo" because of all the talk about it and was instantly hooked. Too bad he only wrote these 3 before he passed away.