For us audiobook lovers, I see no way in iOS 7 beta 6 to access individual chapters. This used to be accessible by tapping in the top right corner, the book cover art would flip over, and voila! a list of chapters. Here, tapping, swiping, and begging reveals no list of chapters in the book. I've tried on Audible books and good old homemade books created in Audiobook Builder.
In addition, now the entire length of the audiobook is displayed instead of just the length of the chapter. This makes scrubbing on a thirty hour book exceptionally difficult. I sure hope, 1) I'm an idiot and just missing this, or 2) Apple reverts or creates a setting to switch between book-length view or chapter view.
Instead of scrubbing the whole book you can use the forward and reverse buttons to skip ahead or back whole chapters.
Not as easy as the old method but better than scrubbing.