The ProjectPier manual is the formal documentation of ProjectPier. It's introductions, FAQs and How-To's should get you well on your way to getting your organization productive. If anything is missing or confusing, feel free to ask for help in Support Forums.
Where's the user's manual?
Please, Printer-friendly version, is not true!
I am not sure but I do not think we have one. I guess it is learn by doing.