I think it’s an immutable rule of publishing that, no matter how many rounds of copyediting a work goes through, it’ll still always, always, have some errors. One of the nice things about publishing on the web is the ability to dart in and click Edit Post if you happen to notice an after-the-fact typo. With traditional print publishing? Maybe not so much.
Except… what about ebooks?
This is kind of like the crowdsourced software patching version of book publishing.