This is really rather fun, the third in the series of supplemental material designed to be used with the Paizo-published Pathfinder RPG Adventure Path Carrion Crown - a means to adding further gothic horror twists to what is already a pretty horrific gothic-style campaign (I should know, I'm GMing it!).
This one concerns a set of artefacts, the Sepulchral Swaths of Tanoth-Gha. If you are puzzled, all soon becomes clear. The 'swaths' are grave linens, think of what you wrap a traditional Egyptian mummy up in - and like the Egyptian ones, these are embellished with all manner of ancient arcane writings and decoration. (The Egyptians wrote spells on theirs and left amulets wrapped in them, by the way.)
Originally, these Swaths were used by a rather unpleasant little cult of desert nomads who worshipped one of these unspeakable ancient eldritch horrors and used the Swaths to bind body and soul into the temporal world with hideous sorcery, creating living mummies that cannot die. You'll still find the poor things, mostly raving mad, in remote desert areas.
There is a lot of ancient lore written on the Swaths, the tricky bit is that to read it you need to wrap them around somebody (think of a scytale), and that of course exposes whoever you wrap them around to all manner of nasty mental effects... but if you do this you can read about assorted necromantic feats and spells, which are described in this product. There are also a couple of creature templates - Mummified Zombie and Fossil Skeleton - which can be applied in the usual manner to appropriate creatures.
All is beautifully-presented and redolent in genuine gothic horror. Even if you don't want to weave these into the AP, it's not hard to think of your own horrific adventures involving these things...
[5 of 5 Stars!]