Woo! Memory lane time!
Picture books. The earliest I can remember were several volumes of Disney books with lavishly illustrated pages and labels of things/actions on them. And the usual ABC stuff with illustrations for things that start with a particular letter (I still remember drawing sharks and airplanes on them - my favorite things to draw when I was barely 6).
Dr. Seuss books. The hop on pop stuff.
The 'Sally' books. I never did find out what those books are called officially. But they were old hand me down books from my grandparents, from the war time no less (WW2). You know those books which shows all american kids doing all american stuff like 'Sally has a big red wagon, Billy has a small blue wagon, Billy likes to play bump the wagons with Sally'.
Fairy tales. Grimm's at first. Only later did I really appreciate Andersen's stories (I think they were more targeted at a young adult audience) - one of my favorites of Andersen's is The Marsh King's Daughter. Both were pretty big for me. I read those books to tatters. Then other modernized versions of them, including one with Disney characters.
Then Edward Lear's limericks. I still remember the owl and the pussycat in the pea green boat.
And that ridiculously inane story about the voyage around the world... I've always wondered what sort of creature Quangle Wangle was (now I suspect it was something racist).
The illustrated 'modern' classics - The Little Prince, Babar and the Elephants (dunno which book specifically, but it was Babar), Where the Wild Things Are, Animal Farm, Uncle Remus (Brer Rabbit and the like).
As I grew older, my elder sisters bought me my first Hardy Boys book (something about Mayan pyramids). I got hooked. I got Nancy Drew, Bobsey Twins, and Hardy Boys books. These were the first books that really got me into reading novel-type stories.
Goosebumps of course. And those weird adventure books where you get choices and you had to skip pages to see what happens next.
Then real classics (this was when I discovered the school library), The Adventures of Huckleberry Finn (never did like it much, the slang too difficult for me to understand and the culture too alien back then, but I read it nonetheless, ditto with Tom Sawyer), The Prince & The Pauper, Little Women, The Swiss Family Robinson (even at the age of 12 I realized that the fauna of the island was totally ridiculous), Moby Dick, The Yearling, Heidi... and a shitload of those short stories compilations.
Also world mythology and legends. Greek and Norse mostly. But pretty much everything I could get my hands on, from American Indian to African to Japanese. One of the books that stand out at this time was the One Thousand and One Nights - not the Aladdin bullcrap but the real deal. It was the first sexually and violently graphic books I've read told in a seemingly fairytale format.
Heck even poems like The Ancient Mariner, The Green Knight, and The Lady of Shalott, The Song of Hiawatha, etc. were read at this time (Partly because they were included in the English textbooks). This was the period when I was already beginning to become the pretty serious bookworm that I am now - I was around 11-14 and I was already amassing scifi and fantasy books in addition to the 'normal' fare.
Also being the sexual exploration time... this was also when I sneaked out my sisters' romance novels and read them.
Two of my favorite authors of all time were read during this period - Rudyard Kipling and Lewis Carroll.
I love my parents for buying us all the books we could possibly want.
It's their best gift to us.
Ok enough rambling. I'm sure I've left out a lot of books. LOL. But I'm getting old. *sigh*
EDIT: Curious George, yeah!