When we're out of beta, we'll open the book up for people to read without any kind of login. For now, though, we're putting this out there largely to get feedb

When we're out of beta, we'll open the book up for people to read without any kind of login. For now, though, we're putting this out there largely to get feedback before publication. Unfortunately, github has fairly coarse-grained permissions, so we need to ask for rather a lot.