Well the title says it all. Order any 2 books for $20, inc. free shipping. You can add more books for $10 each. The email I got says it's for this week only but the verbage at the bottom says expires 6-15-10. The email also says it's only available thru the email but I went direct to entertainment.com and the 2 for $20 was on the site. I'm thinking of ordering one for my area, one for Orange County, and one for Orlando. I used a BOGO free admission just today at our local ice skating rink. Saved $13.