Death (Discworld)
Death has appeared in every Discworld novel, with the exception of "The Wee Free Men" and "Snuff", and had a possible cameo at the end of "Johnny and the Dead" (the character was not identified, but spoke in unquoted small caps). The Discworld books with Death as a leading character, starting with "Mort" in 1987, are:
Discworld
Due in part to the complexity of the novels, "Discworld" has been difficult to adapt to film – Pratchett was fond of an anecdote of a producer attempting to pitch an adaptation of "Mort" in the early 1990s but was told to "lose the Death angle" by US backers.