I use Hal, you can see his ebay shop here, if the book you want isn't there, they will get in in stock for you asap.
You can get a basic idea from the parts lookup site here.
What year is your machine?
If its like the one below then the brakes are inboard and will require a transaxle removal to repair them.
What are they doing? Not working much or fading?
If they are for later machines, make sure no one has put DOT4 brake fluid in the master as it should only be CASE TCH or HyTRANS, --NO BRAKE FLUID-- if you think it is in this model, pump it through as soon as possible, flush with several litres to be sure. There is some more stuff here on brakes. Good luck!