Books by Richard Adams That Are Not By The Author of Watership Down

Recently I finished a checklist of the writings of Richard Adams (1920-2016), the author of Watership Down and many other books. My checklist accounts for the first editions of his books, short stories, juvenilia, nonfiction, and a selection of interviews with him. I was surprised no one had done such a thing before. It will appear in a volume Watership Down