The book I saw was completely on the Challenger, there were seperate books in the same series as that on the Abrams, T-80 and other modern armour vehicles.
A couple of years ago, I finished the Revell Germany 1/72 Challenger 1 straight from the box. It was my first armour kit ever, I've been building aircraft for over 20 years, if you're interested in seeing pictures of it use the links below:
http://rongeorge.com/modules/Gallery/armor/myfirstarmour
http://rongeorge.com/modules/Gallery/armor/Challenger_1
http://rongeorge.com/modules/Gallery/armor/Challenger_2
http://rongeorge.com/modules/Gallery/armor/Challenger_3
I hope you'll post a few pictures of your finished Challenger here, I'd love to see it when its done.
Good luck finding the book I mentioned.