I had several growing up, and really loved them. One of them (my first) I believe was called the “I Wonder Why Encyclopedia”. I looked on Amazon for it, and it appears to be a rather popular title. I would be inclined towards just going to a bookstore and investigating their selection.
I had several growing up, and really loved them. One of them (my first) I believe was called the “I Wonder Why Encyclopedia”. I looked on Amazon for it, and it appears to be a rather popular title. I would be inclined towards just going to a bookstore and investigating their selection.