Does anyone know if there exists a place on the internet, where one can listen to audio books, i.e. The Power of Now: A Guide to Spiritual Enlightenment, by Eckhart Tolle? Thanks! :)

Try http://librivox.org/. It provides free audio-books which are in the public domain.

Librivox.org is the only one that I know.

IN NH we can go to nh.lib.overdrive.com to access libraries that participate in e-books. I did one for a friend today. It can be renewed if she doesn't finish it by due date. Otherwise library will automatically delete it on the due date.