The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals Edited by Maryadele J. O'Neil, Patricia E. Heckelman, Cherie B. Koch, and Kristin J. Roman. Merck, John Wiley & Sons, Inc., Hoboken, NJ. 2006. xiv + 2564 pp. 18 × 26 cm. ISBN-13 978-0-911910-001. $125.00.