“Soulful Music” is the third novel in the “Death” series of Terry Pratchett’s “Discolight” series.
If you are sixteen, your name is Susan and your greatest achievement will be forever - news about those who are truly your granddaughter... Death, otherwise, will be dark in the middle of a clear sky. And now your grandfather has fallen in search of inner peace, and you need to take up his cause. The sword and scythe will be supplied as a set until delivery.
 At this hour, a surprising and never-before-heard music appears in Ankh-Morpork - Music That Rocks. Vaughn is filled with almost all living essences, not subject to spells, it is tempting to collapse at its own rhythm and sing, bathe guitars, dress in a fur with rivets and repair the edges - and the purpose, perhaps, of becoming I’m not safe...
You can take a look at the diagram of the “Discosvet” series and the overflow of books that will last until different cycles. 
Author: Terry Pratchett