Very Young - Mister Men - pretty much all of them, I was a bit mad for 'em apparently.
young - Enid Blyton - Faraway tree, Enchanted Forest, Famous Five, secret Seven
Then got really into Atlasses, Wonders of The World Mag and stuff like that. Anything with good photo's and diagrams and graphs and Information about the natural world. AND SPACE, anything with space.
9ish-13+ - Asimovs Foundation and Empire series, Phillip K dick stuff, Arthur C clarke, really went a bit scifi. and loads of Steven King, but never Liked Tolkein and all that fantasy stuff. And then decided to read books you're "supposed" to read.. Huxley, Orwell, Salinger, etc. Cos I decided I was intelligent HAH!!