If I'm not mistaken, and I may well be, you can actually use that code on a single book and it'll work just fine as a 50% off as well. So basically you can get

If I'm not mistaken, and I may well be, you can actually use that code on a single book and it'll work just fine as a 50% off as well. So basically you can get 50% off at any given time, the sales are completely a marketing technique.