I only recently started collecting again in 2010 so I really don't have a lot of old books from either my childhood or my earlier collecting days back in the late '70s/early '80s. That said, my earliest childhood memories seem to be this book. Either my dad or uncle bought it for me as I started first grade in school. I remember bringing it into class one day and showing my teacher, who told me who the character was. Couldn't really read all of it, but I loved the pictures. Anyway, I re-acquired it again a few years ago.
I also came across the original artwork for this cover last year at a LCS while on vacation in NH (or it might have been ME), but alas, the owner would not sell it to me.