20% off Hooked on Phonics

I mentioned last week that I was checking out Hooked on Phonics, and I registered on their website.  I haven't ordered my stuff yet, and today they sent me a coupon code good for 20% off.  The code is EM1908F5, and it expires 5/31.  I was specifically looking at the K-2nd series, but I'm not sure if it's good for all products.  Worth a try if you plan to buy something! Free shipping when you spend a certain amount too.