The Search for the Dice Man was written by George Cockcroft under the pen name Luke Rhinehart.
The book is set 20 years after the end of The Dice Man, and Luke's dicechild, Larry Rhinehart, has grown up to become a hotshot investor on the stock market.
He has totally rejected his father's reverence for chance: he sees it as an adversary to be overcome, and has managed to create a stable, normal life for himself, in spite of his early abandonment.
It takes a long time - a whole book in fact, but Larry eventually does complete his quest.
Along the way, what he sees and hears change his views somewhat; by the end of the book it is he who is trying to convince Luke, his father, to accept more chance into his life, rather than the other way round.