Copy paste from email i got. I assume that they mean only 1 time use coupon per login as the code seems generic. There are many book at $9.99, so if you're interested, nice way to get these for …
Edit: LInk corrected
Hope people like this and find it useful, I haven't checked out the book as such, but have confirmed it can be downloaded (it's a huge 73 mb download):
Interested to learn card magic tricks...?
A great book(.pdf, 307 Pages) with some picture guides
[The hard copy price @ Amazon is $22.95](http://www.amazon.com/dp/B00064NZ9I)