@menos @fdumont Tor .com (who published the book) are DRM-free across their entire catalogue, AFAIK.

However, I’ve sometimes seen DRM get put on supposedly DRM-free books by the vendor or someone else in the production/distribution chain.

In that case, I think you have to contact the vendor, and they would have to request a non-DRM’d version from their suppliers, then upload that to their servers. I don’t know how open to this Kobo are, or how long it will take them.

Sorry about this.