General information regarding the total range of infective agents in the world may be found in Clinical Microbiology Made Ridiculously Simple, by M Gladwin and B Trattler, MedMaster.
More in depth information regarding anthrax, botulism, plague, smallpox and other organism of concern from the standpoint of bioterrorism defense, signs, symptoms, spread, prevention, and treatment may be found at the following sites:
American College of Physicians http://www.acponline.org/bioterro/
Information regarding signs, symptoms, spread and treatment of bioterrorism agents.
Association for Professionals in Infection Control and Epidemiology
Bioterrorism information for the practicing health care professional.
Centers for Disease Control and Prevention
U.S. Dept of Health & Human Services
http://www.hhs.gov (current relief efforts)
PDR Guide to Biological and Chemical Warfare Response, by John G Bartlett ed
Bioterrorism and Public Health: An Internet Resource Guide, Tara O'Toole, Thomas V Inglesby and Michael Mair
Germs: Biological Weapons and America's Secret War, by J Miller, S Engelberg and WF Broad
America's Achilles' Heel, by RA Falkenrath, RD Newman, and BA Thayer
Bioterrorism: Secrets for Survival, by D Long and S Spencer Jones
21st Century Complete Guide to Bioterrorism (U.S. Government CD-ROM)
21st Century Anthrax Digest (U.S. Goverment publication)
21st Century Smallpox Digest (U.S. Goverment publication)
Preparedness for epidemics and bioterrorism : hearing before a subcommittee of the Committee on Appropriations, United States Senate, special hearing
Living Terrors: What America Needs to Know to Survive the Coming Bioterrorist Catastrophe, by MT Osterholm and J Schwartz
21st Century Bioterrorism and Germ Weapons (U.S. Dept. of Defense)
Super Terrorism : Biological, Chemical, and Nuclear, by Y Alexander and MM Hoenig
Firepower in the Lab: Automation in the Fight Against Infectious Diseases and Bioterrorism, by SP Layne et al
Biological Terrorism, Responding to the Threat: A Personal Safety Manual, by A Salvucci Jr