This illustrates why thrift stores aren't always the ideal place to find used books. I bought The Kite Runner and Jude the Obscure at one Goodwill and The Killer Angels and 1972 at another. The second store was where I bought close to six books late last month and that well dried up real quick.
On the other hand, the first Goodwill I went to had three or four shelves of western paperbacks. If I was a fan of that genre, I'd have been in happier than a hog in a mud puddle. Alas, the prairie doesn't call to me.