The seventeenth edition of the The Merck Manual of Diagnosis and Therapy is available free at the Website of Merck and Co., Inc. This 1999 centennial edition of the Manual has been edited by Mark H. Beers and Robert Berkow and includes contributions from hundreds of experts in the medical field. Users will find over 300 chapters on medical diseases, disorders, and related drug information in 23 specialty areas that include Nutritional Disorders, Cardiovascular Disorders, Infectious Diseases, Gynecology/ Obstetrics, Clinical Pharmacology, and Poisoning. Entries for each disease or disorder provide information such as causes and risk factors, symptoms and diagnosis, prevention, and treatment. The Manual is searchable by keyword and includes hyperlinks to chapters, topics, diagrams, and tables throughout the text. A print or palm pilot version can be ordered at the site.