The Magic Labyrinth
Farmer, Philip José. The Magic Labyrinth. New York: Berkley, 1980 (dist. by Putnam's). [S. F.] Book Club Edition.
See for the giant "protein computer" that helps run the Riverworld, and for the odd combination of mechanism and mysticism in what seems to be the underlying metaphysics for the Riverworld series (TML, To Your Scattered Bodies Go, The Fabulous Riverboat, and The Dark Design).
RDE, Title, 7Aug19