For a while, Amazon.com had When Brute Force Fails at a 35% discount, but a couple of days ago it moved back to full price. Despite that, and with the aid of a couple of nice mentionsone from Canadian Press and one from Tyler Cowen, the sales rank is now in the low five digits, a fairly respectable level. Cost-conscious shoppers may want to buy from BarnesandNoble.com instead, at a 20% discount (less for members of the B&N frequent-reader program).
If you order it from either place, please consider writing a reader review.
Update Competition is a marvellous thing; the Amazon discount is back.
Commenter nikkibong recommends buying instead at Powell’s, which is indeed a great institution to support, and which has a large chunk of the book as a searchable document on its website if you want to read a sample.