Sourcery begins as Ipslore the Red is about to die — or, more accurately — it begins as Death is coming to collect Ipslore’s soul. Wizards can see Death, so some plan to negotiate terms before departing.
Ipslore is an eighth son and a wizard. Banished from Unseen University for marrying and having children, Ipslore manages to create a magic staff for his own eighth son, a newborn he has named Coin, just before he dies. Coin, being the eighth son of an eighth son,