sweet valley high series (book 1 by: Francine Pascal). I read these at the age of 12 and loved them, a new book came out every week that I can remember and mum would get me one. I nearly had the whole collection.
Read the entire series of "Little House" books. A classic series in children's literature! (This is book My favorite childhood series; my son who is in 4 th grade is reading these series now and enjoy them !