September's edition is all about fall and is called Best of Autumn and the images are great for Halloween, Thanksgiving or masculine birthday cards.
Here's how the program works - you pay $17.95 for any of the Anniversary sets and collect the special sticker inside the case. When you have six stickers on your Collector card you redeem it for any set in the catalogue valued at $17.95 or less. How cool is that! More information here!
To see all the 25th Anniversary sets please click here. All of them are available for purchase now and your can redeem your stickers until April 30, 2014.