I used to rip Amiga game soundtracks by putting a tape recorder near the TV speaker. This will work for any DRM content :) Obviously it is lossy, you would need a recorder of some form and it will take a long time for audiobooks. My tape deck had a turbo feature... you could try playing audiobooks faster and then reduce the speed of the recording if such option exists.
If you have a computer with line-in input this will work better than acoustic-coupling :)
Google will just say that pages with DRM will rank higher in their search and it's all done.