put in an impossible situation, our earthman hero has to survive a death world, so he can prove his worth to the galactic bad guys. not only has he to protect himself, but also the victims of circumstance marooned with him. needless to say, earth hero saves the day and impresses the bad guys. the author's descriptions of the various problems the hero faces really make you feel as though you're there (and proud to be terran!). a very enjoyable read, i read this whilst at school 25 years ago and still enjoy it.