D7000 User's Manual and Guide

I've just bought a D7000 and though the suppplied User's manual is OK, I would really like to have another copyin pdf format so I can search it more readily.

I have found a couple on line, but they do not seem saveable, so I have to download them each time.

Is there one that I can keep on my computer?

And which separate guide to the D7000 would forum users recommend?