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:
Death (Discworld)
There are twelve ways of performing the Rite, but eight of them cause instant death, and so might just be considered to summon Death in the "usual" manner, and the ninth is very hard to remember. This leaves three ways to safely summon death: Although the Rite can be performed by a couple of people with three small sticks and 4 cc of mouse blood or even with a fresh egg and two small sticks, the wizards (Ridcully excepted) prefer to do it the old fashioned way, with heavy equipment consisting of numerous drippy candles, octograms written on the floor, thuribles, and similar paraphernalia. They feel it's not "proper" wizardry if it's not showy enough.