Listening to an audio book on some scientific topic will almost always put to sleep within 15 minute. I really like books on cognitive science - I have used boo

Listening to an audio book on some scientific topic will almost always put to sleep within 15 minute. I really like books on cognitive science - I have used books by Daniel Dennet and Dean Buonomano for this purpose. I not only learn interesting things, but I get to relax very quickly.