From Booklist
Olson and Ingermanson's
Fifth Man is a sequel to their brilliant
Oxygen . The same crew, more or less marooned on Mars, returns, but not much happens by way of Mars exploration except for the discovery of ice. The crew's frantic journey to capture enough ice to manufacture escape fuel makes for some fine scenes, but the authors pump up suspense with the gimmick of a "fifth man" who might be a stowaway, an alien, or a figment. A convoluted sabotage plot back at NASA grows rather tiresome, too. Even so, this is a skilled writing team, and they've done their research. The sequel doesn't equal the original, but it's good stuff.
John MortCopyright © American Library Association. All rights reserved
Product Description
In the sequel to 'Oxygen', the crew of Ares 10 lands safely on Mars, but when their work to discover microscopic life on the planet is sabotaged, they wonder if the perpetrator is human or alien.