A single book is going to be under $2 and the rates scale upwards depending upon weight (10lbs is about $5).
But that is not what it amounts to if you factor the entire cost. A single book + shipping = $13. Still a good deal, but it is a good bit more than $5.
I don't want this to turn into an argument about "how good" the deal really is. Bastion has made a very nice gesture with the discount and should be commended for it.
However, there is one major issue that needs to be adressed. There are posters in this thread who appear to have ordered products based on $0 for shipping. If that is truly the case they need to be informed on whether Bastion will honor that price, and if that is not possible what needs to be done for them to rectify the situation.