Originally Posted by HarryT
The publisher has to specify whether or not the book has DRM. There is no "default" (at least not for the Kindle Digital Publishing programme - I don't know if there are different arrangements in place for larger publishers.)
IIRC when Tor went no-DRM, Amazon had a problem changing over, and the 1st book supposed to be released without DRM (Scalzi's _Redshirts_) actually had it on. Tor immediately sent everyone with a receipt a DRM-free book by email, if we complained, and Amazon did eventually replace the file with a DRM-free one.