Downloading ESV Audio?

Is there any way to download the ESV audio onto my iPhone so that I don't have to use streaming data while playing it? After hitting the information button on the ESV Audio Bible, I see the download button, but when I press it, it says that the download completed in about 30 seconds. I know the audio for the entire Bible would take longer than 30 seconds though. Is this a glitch? Is there any way to actually download it?