Cool, just downloaded it - thanks.
Had a quick look at the book. He says:
"Yessir, the book you’re reading has been around the block a few times since I began writing it in November of 1983—which I boggle to think was over thirty years ago. It’s been through four print editions and on paper sold over 125,000 copies. It’s been translated into five languages."
I had said recently, here (in another HN thread):
https://news.ycombinator.com/item?id=11889412
that I heard from a McGraw-Hill editor, that Scott Meyers' book Effective C++ had sold in the region of 50,000 copies. And the editor, Simon Yates, said that was a fairly high number of sales for a computer book.
And now I read (above) that Duntemann's books sold 125,000 copies.
Phew.
I do remember reading that Turbo Pascal was hugely popular in those days, being the first under $100-dollar language compiler (it was $50, IIRC, others were probably closer to $500 at the time). My guess is that it was a combination of factors that led to such good sales of the book - Duntemann's own programming and writing expertise, for sure, but also the huge popularity of Turbo Pascal, and the fact that it was a boom time for desktop software apps and companies. Let's hope that his new books also become hits.
Edit: spelling.