Yeah, and not all those for sale on-line are the current versions. Buyers should be careful. it matters not to the instructor (or PADI) from where you purchase the training material, so long as they are current versions. It likely matters to a dive shop that sells the materials, but we are talking about standards, not profits.@JackD342
What if a student showed up with a PADI book they bought on Amazon instead of through your shop?. I looked - OW, AOW, and tec are all there for sale.