The third Weekend of any (normal) month is the book sale room at the San Diego Public Library in University Heights—9 a.m. to 3 p.m. on Saturday and Noon to 3 p.m. on Sunday. Prices are generous: Books and DVDs are generally a buck. Paperbacks are twenty-five cents each or five for a dollar. What’s not to like about that? Greedy shoppers!

Recurrent pattern: The earliest people in the doors grab, grab, grab. Someone might ransack sci-fi paperbacks, for example, piling them in a box and setting it aside with sign Taken for later sorting. They then move onto the shelves searching for more treasures.