I keep my original copy around! I read it when I was in 7th or 6th grade, it was pretty new at the time. It forms the core of my financial values, so to some of us its an important book.
If you want practical they are out there, sitting right next to my hand as I type this is Steve Berges book:
The Complete Guide to Real Estate Finance for Investment Properties. This book is very practical he gives you spread sheets of various deals his company has done, formulas, insight ect. So you can make your own, and use it as a basis to create your own system. It reads almost like a text book, so you have to really want the info to read it.