An app called Emergency First Aid & Treatment Guide - phoneflips is a quick reference you can access right from your iPhone, iPod Touch or iPad.
This app is like having that emergency kit in the trunk of your car. You never know when you are going to need it. The content in the guide is very concise and current. It covers almost every medical emergency in a no nonsense quick to find format.
Obviously it's not there to replace 911. But it is a quick reference in the event you are ever in an emergency situation. The cost of the app is $0.99. I searched Amazon.com for a similar book on the book store and found The Pocket First-Aid Field Guide: Treatment and Prevention of Outdoor Emergencies
If you don't have the app yet and it's something you may need some day it's available now in the iTunes App Store.