blood gases manual
chest pain manual
EKG manual
trauma manual
these are written by "the founder of Mad Scientist, Dr. Bruce Argyle, MD is an experienced physician and is currently Chief of Emergency Medicine at Cottonwood Hospital Medical Center in Salt Lake City, Utah. He is also a Fellow of the American College of Emergency Physicians, recently serving as President of the Utah Chapter."
they are concise, easy to understand and well written. he has cd's available for individual health care providers as well as group rates for hospitals or schools. i'm really impressed by the text. if i had the money, i would get the cd's, because i personally learn better by doing rather than reading, but it's pretty easy to absorb these texts.
http://www.madsci.com/aboutus.html