OPDS may work fine to distribute free digital catalogs, but I find it pretty hard to integrate it with purchased material. You definetely won't have the same ex

OPDS may work fine to distribute free digital catalogs, but I find it pretty hard to integrate it with purchased material. You definetely won't have the same experience as a proprietary platform. So your end - user downloads a random opds-enabled client, and adds your catalog. Let's say you want to make sure the client owns the material. You can't expect the client to redirect to a sign - in page, that's not part of the protocol. Purchases also do not work well (try the O'Reilly opds for example) . It's just a mess. It's not clear to me what exactly opds is trying to solve. I found it such a stretch when they claim it's an alternative to proprietary book platforms. These systems have tons of people thinking about the entire user experience. What opds offers is just a tiny fraction of what's necessary to build that.