This isn't intended as a 'hard sell' technique, but if you haven't purchased the "Catalyst" books yet and are interested, you may want to act soon, as I'm preparing to increase the prices.
The reason for this is because I'm getting ready to finally list them on Amazon. However, since Amazon pays authors significantly less than I'm receiving now, I need to adjust the prices in order to make up for it. What makes it worse is that Amazon (the king of undercutting others prices, refuses to allow authors to charge different prices on different sites.
I'm still working on getting the books ready, so you should have a little time, but the cost of the books will go up. I'll try to minimize the sticker shock, though.