THE HARD-CORE SCIENCE OF HAL CLEMENT The supreme practitioner of "hard" science fiction, Hal Clement combines ingenious problem-solving with suspenseful drama and action. These ten stories show the mastery of science and fiction that Clement has displayed in such favourites as Mission of Gravity, Iceworld, and Needle. UNCOMMON SENSEIf your back's to the wall, even a deadly predator can be useful. ANSWER"Know thyself" is great advice...if you don't follow it all the way. QUESTION OF GUILTWas he a medical pioneer...or the first vampire? IMPEDIMENTMind-reading makes for perfect trust - as long as it works both ways! -AND LOTS MORE!