He's on speed.
Plus they ain't all good. Check out rose madder for a stinker
The only poster who made Steve Lake wet his pants 4 times without ever breaking a sweat each of those times.
Wildmanwizard
That wouldn't surprise me.
But looking at his bibliography, he's only putting out one book every year or two. And three of the books he's put out in the last decade do have a co-author listed.