Oooh a new book!? Sounds good!
When I got started in peafowl I liked to visit a lot of places with peafowl like peafowl breeders, zoos, ect. You can talk to them about their peafowl and observe them to see how they behave. Mainly I used the internet to educate myself on peafowl by finding peafowl websites and looking at all the information on the websites and I still look at different websites to learn new things like just yesterday I learned something new. I mainly read and then re-read things to memorize them, but mainly because I am so interested in peafowl I retain everything I read about them better than how I retain things I learn in school.
I can give you a few website links for information if you just want to read up on some things, first I think I will start with Conner Hill's website since he just helped you, he has a good website for info:
http://boxess.com/connerhills/articles.html
This next website has several great articles that apply to you, like an article about things to consider before buying your first peacock:
http://info.amyspeacockparadise.com/
Then here is the UPA website connerhills was talking about were you can buy the book and it also has some good articles to look at on the website too:
http://www.peafowl.org/
Here is yet another good website with some articles and info on pens with pictures, ect:
http://www.hopkinslivestock.com/peafowl.htm
Hope this helps you, you just have to do some research about them, and the more research I did when I was thinking about getting them, the more I fell in love with them and just had to get some!