Got my royalty statements from Putnam, dated up to last July.
I've sold roughly 90,000 copies of PNM (55k hard and 35k soft). That means I'm close to 80 percent of the way to paying off my advance (called "earning out").
As for BFA, it sold 20,000 copies in its first nine months, which is roughly half of what PNM did in the same time frame. I'm only about 25 percent of the way toward earning out on that book, and it may take quite a long time there, depending on what we see with the paperback. The key will be whether or not BFA eventually picks up the regular school sales like PNM has apparently started doing.
The glass-half-empty thing is to note how long it takes to get beyond your advances.
The glass-half-full thing is to note I've sold about 110,000 books and all four versions seem to be hanging in there reasonably well on Amazon.
Of course, all of this is relative. My first book, a classic academic adaptation of my dissertation, has sold about 500 copies worldwide in the last decade and a half.
I have little idea about sales to date in Japan and Turkey. All I ever heard about Japan was that I sold about 9,000 units in the first six months there. That number could have been sales to stores but not completed sales to readers. Store typically return about 40% of the books they get from publishers back to the same publishers. Still, even if that were the case, I gotta admit I was stunned to even have a book published in another language, much less sell thousands of them.
Why bring all this up?
Well, simple answer is that I got the statement in the mail.
Trickier one is my recognizing that Vol. III needs to be a bigger seller than BFA. Otherwise I fall from the ranks at Putnam, where the standards are amazing high.
Still, I think the key is writing books you feel have never been written and can only be written by you. Once you get to those points and have it in print, you just have to be satisfied--on some level--with that accomplishment and that alone.
I know I have to write Vol. III, which in many ways will be less a follow-on and more a how-to deconstruction of what I believe in serious horizontal thinking. I just feel like that's the next logical step in my evolution: making the process of thought itself a strategically reproducible concept.
I'm confident I can sell it, but I'm certain it needs to be written.