My uncle dies. He wrote a book and has a significant estate. In his will he leaves me the revenue from that estate.
I don't see how I could possibly be bound by any contracts involving that estate at all.
Try this. Your uncle writes a book that has significant value. He forms a corporation which owns the rights to that book, has the corporation enter into a number of contracts and then names you as CEO. At that point it doesn't matter if he lives, dies, or is abducted by aliens and carried off to Betelgeuse VI. The corporation, not the individual, is responsible.