The more I think about it, the more I'm upset that the @eff teamed up with humblebundle.com to sell drm-enabled books: https://www.humblebundle.com/books/seanan-mcguire-urban-fantasy-bundle-books . As a long-time donor to the EFF (going back to the 90's) I've always felt pretty confident I understood where they were coming from. I'd really like to know if this was an oversight on their part, or if they no longer consider DRM in the (book) publishing market a problem.
Humble Book Bundle: Seanan McGuire: The Urban Fantasy Bundle

Experience Seanan McGuire’s beloved October Daye and InCryptid series in this enchanting bundle & support the Electronic Frontier Foundation with your purchase!

Humble Bundle
@eff I'll note that if you click on the humblebundle link you'll see a statement that it works on any device. If device means android vs ios, perhaps, but if "device" means that I can use the e-reader of my choice, certainly not.