The computer world is like an intellectual Wild West, in which you can shoot anyone you wish with your ideas, if you're willing to risk the consequences.

If you like this book, you might also be interested in Why to Not Not Start a Startup, a recent essay by the author of the book.

The big mystery to me is: why don't more people start startups? If nearly everyone who does it prefers it to a regular job, and a significant percentage get rich, why doesn't everyone want to do this?

There have been discussions about Y Combinator here in the (recent) past.