It's $14.99 at Barnes and Noble and $18.59 here on Amazon.
Link as proof:
Edit: (Trimmed link)
Edit 2: Apparently only for Canadians. The price discrepancy doesn't exist for Americans. Amazon has some crazy hate for Canadians. (Prices are higher, a significant amount beyond the $1.02 exchange, and no new Kindles.)
Edit 3: Amazon insists the Canadian price is charged by Penguin, so it's not Amazon that has a crazy hate for Canada, it's Penguin Publishing. ("This price is set by the publisher.")