Oh, dear. I seem to have shut everyone up with this one. Here are some more clues.
The author died a few years ago, but I'll bet further updates will be published. I'll also bet that many of you who live in the American East, South, or Midwest have an edition of this book, and have never read it. You may have looked at the pictures, though. (Those of us in the West have a different book by the same author. Gumtree may well have a similiar book).
The character, as I said, also appears in the title of a classic novel and a classic movie. The movie starred Gregory Peck.
There! THAT should give it to you. I won't be on the computer again perhaps till tomorrow, when I'll see how you did).