Originally published in print: New York : DAW Books, 1974.
An expansion of the authors Castaways' world, published by Ace Books, 1963.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Polymath by John Brunner. ISBN 9780575101630. Published by Gateway in 2011. Publication and catalogue information, links to buy online and reader comments.
