This was tried in another site, it was successful, all were e books, there was a list on forum as to what book shall be read and discuss, I think there were 5 books to choose from and a variation, like Mystery, venture, science and so on. One of each would be posted.
Must remember if a person can get that book. One area of the world can't get it where as another place can, not everyone can get ebooks, so this has to be discuss on forum, make sure you choose two, so when you finish the one book, you will have the second to go onto, while reading that book, put up five books to choose from again.
This is only a suggestion, you can choose as many books to post and see what members would like. Choose your own rules, but the most important thing is .... To have fun.