The 4-Hour Chef: What’s the Value of a Listen?

For author Tim Ferriss, it’s a 100% increase in book sales. Audiobooks have become big business. They’re now a $1.2 billion industry. Unit sales of downloaded audiobooks grew by nearly 30% in 2011 alone. Within this context, what’s the value of giving one away? The real question is: what’s the point? For an author, what…