Grade school as in Grade 1-8? I read almost every book there was about animals in my school's library when I was in grades 1-5, I was really into non-fiction when I was younger. They weren't that boring. When I got into middle school I got more into fiction books like the Guardians of Ga'Hoole series (there's a movie coming out for it?!), Percy Jackson series, and a bunch of other fantasy novels. Now I like historical fiction, or suspense/thriller.