From their website:
In February of 2005, Rattrap Productions and .45 Adventure were first launched onto the world. Well, it took a while to reach a lot of the world, but the game has now been shipped to more parts of the world than I thought would happen.
To celebrate this historic event in the life of our company, we’re going to do something we rarely, if ever, do. We’re going to have a sale. And 5 years is a big deal in the life of a small miniature game company so I want the sale to be something big as well.
Each weekend in February(Friday to Sunday) we are going to put select printed books on sale. And we’re not talking 10% off or 20% off, but a whopping…
50% off the cover price.
There is one caveat to this deal. It is only going to be on books we have in stock. As you know, we have had to switch printers several times and though we finally have one we like, the prices are higher. I could not offer this deal on the new books being printed, so the stock is limited to what we have had printed from previous printers.