If you want the audio version for free, check iTunes (and I'd imagine Google Play, but I don't know for sure) for Dan's podcast - it's a fixed number of episodes with each one being him reading a chapter of the book.
For those who resonate with Dan Pena - watch this video, its EXCELLENT ...
Dan takes the piss out of the muppets who are HOOKED on the GURU self-help BS, AND EXPOSES what the gurus really are (bunch of charlatans)
...Dan also talks about how the world has changed for the WORSE with the 'political correctness BOLLOX'...especially here in the UK, I mean look what we have as a prime minster a Treasonous C**T by the name of May!