We've talked a few times about migrating the group off Google Groups, as it's a harder way to communicate. Several people have recommended
bookclubs.com, which has a website and an app which are both easy to navigate. I've attempted to set up a Book Club for us on that site. As this email list is pretty large, please let me know if you'd like to be invited to that group - I think many folks would like to message through that. I will add your email to the membership on the site if you reply to me!