I probably should have specified Kind 1 clients, but that's interesting that Alexandria has it. So books that I have published to my relays, others will easily find, even if they haven't specified they want to read from any of those relays? Currently the only options I see available are to look for books that are saved to Alexandria's relays or from my relays. No option for viewing what the folks I follow have saved to theirs.
Discussion
We had "from follows" as an option and decided to go with the relay list, instead.
We pull the books from your inboxes and publish them to your outboxes.
But it will be more interesting when we add in comments and highlights and etc. They'll help create the feed.