Nice share Reaver
I did the red cross course and after that I wanted to continue learning so I got the PHTLS manual, for sure doing a EMT-B as WhiskeyJack suggest is better, but if you can't afford it or you don't have the time, reading the manual will give you great insight about emergency medic procedures and most importantly the WHY
The book explains briefly how the human body works usually, how an injury can damage it, what are the effects of that damage, and what can you do to fix it.
Last edition also contains a companion DVD with videos depicting the procedures, I have 6th edition and the DVD videos are not big deal.
Also you have two editions, the military and the civilian one, both books are the same one but military edition also contains a few extra chapters.