Thanks for your question. I initially published it Sept 6 just to test it out and make sure everything was working with the “real thing” (rather than just on Amazon’s previewing system, which is not 100% reliable). After that I input the discount, but did not announce the release until I could confirm that the discounted price was in effect. It can take a while between when the price is changed and when Amazon actually puts it into effect.
You can now take advantage of a 20% discount through Tuesday, September 12. I plan to go back to a 30% opening discount for subsequent volumes. Since this Vol. 5 discount is only 2 USD, you might want to wait until you get to this level, just in case your plans change and you switch to Arabic or something!