I'm reading "Second Life" The Official Guide - which is pretty helpful to me as I don't have much experience with Second Life and there's a lot I want to find out about.

The other book I just ordered was a tip from Steve Rubel (BTW, I tried to add my blog to his list on del.icio.us  (but I don't know how to add webmetricsguru.com - or for that fact, artnewyorkcity.com).

The other book I just ordered today is called Start Your Own Blogging Business (Startup)

Let me be clear - the last thing I want to do is start a blog network - or anything like that - but I'm curious to see what Entrepreneur magazine says you need to do to make money on blogging.   I already make money on my blogs - but I don't control the advertising directly (except by the topics of what I write about, I suppose). 

I'll review both books once I finish reading them.  The Second Life book is pretty good so far - but it's just about the only book on Second Life now, and it was just published a couple of weeks ago.