No, I'm not joking. The app is called Ebooks2CW and it can make mp3 or ogg files.The audio files are full of beeps that correspond to dots and dashes. There's a version for Linux and Windows, and the Windows version also offers a GUI to make it easy. Ebooks2CW only works with text files, so it can't really convert your ebook library. But the idea is there.
Now, I don't see any real use for this app, but I still think it's cool. It' right up there with my plan to build a collection of ebooks on punch cards.
Oh, yeah, at one point I had worked out a plan to start an analog ebook lending library. I never followed through on it due to limited funds at the time, but it was a fun little project.