Trouble downloading

Im glad I found another reading app, but downloading seems hard. I was able to download a free book but after several attempts! I couldnt find the feature thatll enable me to change the background to night, etc reading. This is very important. Right now I cant rate your app except 1star and thats after realizing I cant send this review without doing so, sorry.

mighty.mom about BookShout: eBook & Reading App, v3.0.3