Assuming you're not joking, that's the point of the podcast... hence the title "If Books Could Kill". They're reviewing bad and possibly dangerous books.
The weird thing is that setting used to be in the trackpad settings! I have no idea why they moved it. It's one of the first things I enable on every device I use.
I just went through this exact situation a few days ago. The designer of the app chose Avenir, which is included in iOS 6 but is not part of Android, so I reached out to Linotype to find out how to license it for an Android app. The responses were confusing and inexact (and slow - apparently they only have sales staff in Germany, and I'm in California, so the time difference means every go round takes a whole day). After 2-3 email exchanges I gave up trying to get a coherent answer and we're using a bundled-with-Android font. Oh well!