First, and I think I've asked this before but can't remember where, but are book clubs allowed on the Tapas site? I'm just not sure how non-fiction books are handled.
Secondly, what format of book club sounds more appealing to people?
Pairing you up to read 3 chapters for each other a week?
Featuring a book every week that you must read 3 chapters from?
I was running a club on my discord, but I think it would potentially work better on the site itself.