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:
Machine of Death
All of the stories featured in "Machine of Death" center around a device which, when provided with a blood sample, can identify the way a person will die. The machine relays this information by printing a short word or phrase, which serves as the title of each story, on a small card. The machine is never wrong, but often vague or cryptic. The premise was inspired by an episode of Ryan North's "Dinosaur Comics".