.
Think again. Read this written by Lynn Viehl, which supplies some figures that may surprise you.
The truth is that few fiction writers make enough to earn a living from book sales. The only reason I survive is I have a husband who earns too, and I earn money from other sources.
.
I assume it makes a difference if your books are picked up for film making. We hear that J.K. Rowlings(sp) is making a mint, but then several films have been made too.