Creative Commons Licence
Attribution: You must attribute the work in the manner specified by the author or licensor
Noncommercial: You may not use this work for commercial purposes
You must not use any part of this work for commercial purposes, including reselling the work, or making the work into any other format, digital or otherwise and selling it directly. However, use of the work for your own private purposes is allowed and use of the techniques outlined in the work is of course allowed.
Share Alike: If you alter, transform, or build upon this work, you may distribute the resulting work only under a license identical to this one
Exactly as it says. This is all about sharing, not grabbing.
Drop me a note: Not essential but a nice thing to do