Based on the novella Breaking strain / by Arthur C. Clarke, published in Thrilling wonder stories, 1948 and in the collection Expedition to earth, 1954.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Arthur C. Clarke's Venus Prime by Paul Preuss. ISBN 0671038885. Published by ibooks in 1999. Publication and catalogue information, links to buy online and reader comments.
