The section Learn at this link is some frightening! :)
http://www.grasshopper3d.com

And I don't speak about the documentation Online of the grasshopper components! ;)
http://rhino.github.io/#System

So these (free) PDF books will be our nightstand books next years! :D


http://www.liftarchitects.com/s/Grasshopper-Primer_Second-Edition_090323-rn88.pdf


http://download.mcneel.com/s3/mcneel/grasshopper/1.0/misc/en/Generative%20Algorithms_CaE_Strip%20Morphologies.zip


http://download.mcneel.com/s3/mcneel/grasshopper/1.0/docs/Generative%20Algorithms_CaE_Weaving.pdf





http://s3.amazonaws.com/mcneel/grasshopper/1.0/misc/en/Generative_Algorithms_CaE_Porous_Shell.zip