Drug Evaluations, Sixth edition, prepared by the American Medical Association. xviii + 1654 pages, illustrated. American Medical Association, 535 North Dearborn Street, Chicago, Illinois 60610. 1986. $75.00.

Living Together: The Biology of Animal Parasitism, by William Trager. xii + 467 pages, illustrated. Plenum Publishing Corporation, 233 Spring Street, New York, New York 10013. 1986. $59.50.

Morphology, Physiology, and Behavioral Biology of Ticks, edited by John R. Sauer and J. Alexander Hair. 510 pages, illustrated. John Wiley & Sons, Inc., 605 Third Avenue, New York, New York 10158. 1986. $74.95.

Trypanosomiasis: A Veterinary Perspective, by Lorne E. Stephen. xix + 551 pages, illustrated. Pergamon Press, Inc., Maxwell House, Fairview Park, Elmsford, New York 10523. 1986. $90.00.

Health Status of Kerala: Paradox of Economic Backwardness and Health Development, by P. G. K. Panikar and C. R. Soman. iv + 159 pages, illustrated. Centre for Development Studies, Ulloor, Trivandrum-695011, Kerala State, India. 1984. $15.00.