Genetic Engineering: Dreams and Nightmares by Enzo Russo and David Cove. W.H. Freeman, New York, 1995, pp. 243, $22.95, (hbk); DNA & Destiny: Nature & Nurture in Human Behavior by R. Grant Steen. Plenum Publishing, New York and London, 1996, pp. 295, $28.95, (hbk); Double-Edged Sword: The Promises and Risks of the Genetic Revolution by Karl A. Drlica. Addison Wesley Publishing Company, New York, 1994, pp.241, $20.00, (hbk).