If we can include TV series as a collections films made from books, I think the "Inspector Morse" television films vastly superior to the original books by Colin Dexter. This is because, in my view, Dexter is not a particularly fluent or inspiring writer, and he also occasionally reveals a rather patronising, slightly superior "I was at Oxford, you know" side of himself in his writing. For me, the TV series as a whole wins hands down over the books as a whole.