We will be licensing all of the works authored by ourselves within the book under a Creative Commons Attribution license (CC by). This means anyone is free to share, use, adapt or build on things that they find. We will be using a CC license because we believe in the value of sharing and adaptation, and this is something that traditional “all rights reserved” copyright does not allow by default.
We would like to give submitters a chance to choose a license that best reflects their relationship to their work and how they are comfortable sharing it. Within a CC license, there are provisions to disallow adaptations or remixes (No Derivatives), oblige sharing parties to apply the same license (Share Alike) and to restrict commercial use of the work (Noncommercial). You can read more about these on the Creative Commons website