I still have my hardcover book "The Velveteen Rabbit" which has a few scribbles inside, but still in decent shape. Also Captain Kangaroo read it on his show once.
Here are a few more that I received along with this.
Flat Stanley -Jeff Brown (40 years old)
Thy Friend Obadiah -1969
Amos and Boris - William Steig
A Penny, a Look - Harve and Marge Stemach
I realize these are older books, but most of these were best sellers in their own respective time.
While I was looking through our family library, I found a "Donald Duck goes to Frontierland" book that sold for 29 cents when it was released. (My wife's book)
So what was your first book and what kind of memories do you have?