Tor doesn't put DRM on any of it's titles. For an example, look up Cory Doctorow's book Walkaway. At the bottom of the book description it says:

> At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.

Unfortunately, they don't always tell you. If you look up Little Brother (another of Doctorow's books), it doesn't say anything about DRM even though the book doesn't have DRM.

Ah, well, at least the sentence is consistent and does not change. Something like:

    site:amazon.com "At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied."

Gives me ~37.4k results (out of ~5m Kindle books, assuming that Google indexed every single one of them).

All of Cory Doctorow's books are available DRM free and free-as-in-beer free from his website, craphound.com

He's always made a point of that

Walkaway is his first book that isn't available from his website for free.

oh, ok

It's completely up to the publisher (or author if self-published) to enable DRM or not via a checkbox in the UI when publishing on Amazon.

We've been releasing ours with the same CC license as Cory Doctorow, but honestly very few people really seem to care, unfortunately.