For all the good of the readers in this app, I suggest that the developers should:
CREATE A [NEXT & PREVIOUS] BUTTON FOR THE CHAPTERS — the usage of the volume button of the phone is not really that good for there are some readers who reads while listening to music with the same phone wants to lower or makes the volume louder but instead it changes the chapter, the swiping method—needs multiple swipes in order to go to the next chapter.