$20 for $40 Worth of Books at Simon & Schuster's Online Store

Get this deal from Groupon:
http://gr.pn/ef3m6G

• Expires Mar 1, 2011
• Limit 3 per person. Limit 1 per order. Not valid until 12/1. Not valid for EBooks or mass-market paperback editions. Must use in 1 order. Tax and shipping not included. Not valid with other discounts or other offers.