Now when browsing a book, you'll see a pane letting you know how the people you follow have interacted with the book you're looking at.

You'll see a summary of how many people have some relationship to the book, two of the most recent reviews, and which people you follow, if anyone, could not finish the book or want to read it.

When you click through to "See all activity", you'll get a page that shows everything relating to people you follow and the book in question!