Parallella Reference Manual?

Where is the Parallella Reference Manual?
All I can find is a dead link...
Is this the book I need to learn how to talk to the epiphany through C?
i.e. API, explanation of calls, ...?
All I can find is a dead link...
Is this the book I need to learn how to talk to the epiphany through C?
i.e. API, explanation of calls, ...?