sign in and select to download primavera applications option and choose Contract Management. Download the application media (about 700mb)
install it and test as you desire
the help manuals are in the Documentation folder
As far as I have seen you will not find a book on CM. It took ages for writers to publish book on Primavera Project Planner. It may take a few years till someone writes a book on CM. Besides, it is not that difficult to get a hold on the detailed manual of CM.