Dickens and Prince. A particular kind of genius

In Nick Hornby´s completely joyous and original new book two great figures share the stage. Charles Dickens and Prince. Two wildly different artists who caught fire and lit up the world in ways no others could. Where did their magic come from? How did they work so hard and produce so much? How did they manage or give in to the restlessness and intensity of their creativity? How did they use it, and did it kill them?