My earliest childhood memories with a book would involve the book Johnny and the Tool Chest. It had very few pictures but my dad would read that too me over and over as a child (when we weren't watching professional wrestling). Eventually I could read parts of it myself. My parents said I could read when I was four so it must have worked. I still have the book sitting on my bookshelf now. I haven't read it in years. I wonder if it is still as good as I remember it.
My other favorite books that I read over and over in my grammar school years were action adventure books like The Sign of the Beaver and My Side Of the Mountain. I think I have owned three copies of Mountain through the years.