For a Google phone: If you do not have an app to unzip files, click on the icon to get one without any cost
Once the download of your file is complete, click 'open' with Winzip.
Extract the files. Depending on what music player you have installed you should find the mp3 clips ready in the player.
If not, go back to your 'download' folder, and arrange the order numerically, ensuring that the first file is at the top. Click on it and it should play in the Google music player. Once a chapter is finished simply slide on the screen to the right which will move onto the next chapter.
If you are using an independent music player, the chapters will automatically play one after the other.