It's not easy to do a conversion on a truck. I wouldnt even try it with these newer, fuel injected, 15,000 miles of electric wire trucks. The simplest, most cost-effective thing (and with less headaches) is to just buy another truck that is already 4x4. That said...
The way i would do it is find another (donor) truck that is 4x4 and has the right stuff. Old Toyota trucks are popular for solid axles. They are leaf sprung axles and are easier to adapt to another frame than coils. It is complicated to do if you are not mechanically inclined. You seem like you have some experience, so just use your skills for everything you can.
That is where the donor truck comes in. You have a guide to go by and its not so intimidating. Just plan ahead and think of every possible expense before starting. There is nothing worse than starting a project and running out of money before its finished.
Build it right the first time. Everything you have to fabricate, make sure that it will take the beating of wheeling.
That's just the start of it. I don't claim to be an expert on this. I'm just trying to help out the best i can from my experiences. Sorry, i don't know of any books. The Ranger Station
is a good place to start.
Let us know what you decide or any more questions.