The app is sufficient. – O'Reilly Review

O’Reilly has always had awesome books, so I love that you can access their full collection with the app. However the app has a few rather annoying features (or lack thereof): - It always wants to jump to the next chapter when scrolling a page up. It’s extremely jarring and annoying when you don’t know when the chapter is done and you’re scrolling up just to make it easier to read the next paragraph, then the app scrolls everything off screen. - Dark more is very non-obvious. The app should default to using system settings, but allow for manual overrides.
Review by Danatos on O'Reilly.