Not that I know of, but a very good question, and they do promotions fairly frequently. I'll check with the marketing people and see what I can do.
If you buy it through manning.com's online store (through the link above), you can use the code hpython37, which will give you a 37% discount for print or e-books.
Thinking about it, I possibly should have organised that ahead of time, but cest la'vie.