I just noticed this and I'm not sure if this is anything new or what. It does say 'early acces'
https://www.amazon.com/amazonbookclubs
I tried creating one and it says it's not available for my account yet. Looks like you can only join currently opened bookclubs (I'm not really a fan of all those mainstream books).
Can anybody else try creating your own clubs? I'm just curious. I'll probably never use this feature.
I wonder if they will integrate this feature on the ereaders.