It's not possible. ;-)

The bottom line is that the goal of a person like myself is to influence my society, and in order to have the most influence, the product has to be free. The only way a person can make money is with a good which is in scarce supply.

Furthermore, books are luxuries rather than necessities. And our Western society is a need based economy. People will always spend money liberally on what they need, and then become much more frugal when it comes to those things that they want.

This is the reason it's impossible to make a living as a writer, a photographer, an artist, a filmmaker, or a musician. Oh well.

I wrote a letter to the Obama transition committee about how we might change over to a luxury based economy - which I think would be much more fun. But it would require a very big rework of our economic systems.