So, they can bu ya book and format shift it, but when I do it, it's piracy? Looking at all DMCA/DRM systems.

Format shifting has a DMCA carveout. It is 100% allowed. Since around 2000, the rule has permitted it for:

> Literary works, including computer programs and databases, protected by access control mechanisms that fail to permit access because of malfunction, damage, or obsoleteness.

DRM being covered under other laws, and being gross, still applies. And still applies to industry giants, too. Which is why most who do this, like Google, actually buy physical copies and scan it destructively, so they don't have to deal with it.