Navigate to next/previous chapter by tapping left/right side of screen like kindle paperwhite.
I find the swipe action requires a very vigorous swipe, on my Lumia 640 at any rate. Its a bit more distracting too. A tap on the side like you can do with the kind e-readers would be a simpler approach.
Dan Mercer commented
In my opinion, changing chapters and changing pages are different things:
Changing pages on kindle is how you "scroll" through the text. It's done frequently and in the middle of reading, sometimes in the middle of a sentence, so it needs to be an unobtrusive and quick gesture.
Changing chapters is different. Changing a chapter happens at most once a minute or so; the way to progress through the text within a chapter is to scroll down, which (in the Kindle app at least) is not used in e-books where page-swiping is used.