Anyone queasy about the invisible health risks that allegedly threaten everyday life had best not open Debra Lynn Dadd's The Nontoxic Home and Office (Jeremy P. Tarcher, 800-847-5515; in New York, 607-775-1740; $10.95), an up-to-date itemization of just about every unseen peril that exists. While a large portion is devoted to such universal snares as tap water and toilet paper, a sizable remainder specifically impugns the very heart of enterprise -- the office. Consumer advocate Dadd describes the dangers of toxin-redolent carpeting and particleboard furniture (see "Rugs and Similar Health Hazards," September 1992, [Article link]), as well as perils peculiar to copiers, marking pens, ventilation systems, laser printers, paper, typewriter-correction fluid, pumping gas to get to work, and, of course, computers. Some categories are deadly serious, some alarmist bunk. (Office coffee comes from countries that disdain pesticide regulations, she says to unnerve us.) To sort them out and effect appropriate relief, refer to the book's extensive bibliography. -- Robert A. Mamis