If you have never done this before, do get a book specific for your car. In my town, I can check them out at the library for free. If not, buy one for $15-20 at your local auto parts store. For some models, Chilton'* is OK; for some Haynes is OK. See if you can look at each before you buy.
Read everything in the book relating to what you want to do BEFORE you start. You can save yourself a lot of time and work. But, realize that these books don't often cover everything you have to do.
Before I turn a wrench, I make a lot of inquiries to suppliers for all the parts and shop services I imagine I will need and calculate the estimated cost to do the repair. Sometimes, this will guide you to a used engine or to other alternatives.
When I pull an engine, I do several things that help a lot. I invest $2 in a package of zip-loc sandwich bags and a magic marker. As you remove fasteners from each part, make a little drawing right on the bag of where the long bolt goes etc., then put the bolts in the bag and label it "PS pump mount" or whatever. Take the time to label vacuum hoses with a piece of masking tape "A" to "A" or whatever is easy for you to follow. I keep the parts I take off in order so that when I go to reassemble, everything is pretty much where you need it. I always clean the reuseable fasteners with a wire brush wheel on my grinder. If you don't have a parts cleaner, get a laundry tub, a parts cleaning brush, some kerosene and a good pair of nitrile gloves. At the very least, make sure the mating surfaces are as clean as you can get them before you reassemble parts. Take your time and be gentle with the many different types of electrical connectors, these plastic parts get brittle with age and low temperatures. Warming the plastic with a hair dryer will often prevent breakage of the plastic.
If you have never rebuilt an engine before, if at all possible, get someone who has to help you. It is easy to make very expensive and harmful mistakes working on engine internals. There are lots of little things to know that you won't find in most books.
One of the finest books ever written on the subject of engine rebuilding was "How to keep your Volkswagen alive forever" by the late John Muir. This book is worth its price for the artwork alone and will help anyone develop useful skills in engine work even if you are working on a Pontiac, and not a VW.
Take your time, have fun, learn a lot, a save a ton of money!