Time was running out for Bob Kinnaird. Without much warning, the Hunter - the green protoplasmic alien that lived inside him and cured all his ills - had suddenly become his destroyer. Day by day Bob grew weaker and weaker, but only specialists from the Hunter's distant world would know what was wrong with him and, more importantly, how to save him.
But the only way searchers from his planet could find him was to locate his missing spaceship . . . a spaceship that had crashed beneath the ocean years before, its location still very much a mystery. Once again leading an investigation against time - as he had done so many years before - the Hunter knew he had to find comrades and find them fast . . . before someone murdered his best friend.
Hal Clement (1922 - 2003)
Hal Clement is the nom de plume under which Harry Clement Stubbs wrote science fiction. Born in Massachusetts in 1922, he graduated from Harvard with a BSc. in astronomy, and later added degrees in chemistry and education. A former B-24 pilot who saw active service during the Second World War, he worked for most of his life as a high-school science teacher. He made his reputation as an SF writer with the work that appeared in Astounding, where his best-known novel, Mission of Gravity, first appeared in serialised form in 1953.