How a public library's summer game took over a Michigan city

The Hautamaki family (Shannon, left, Ian, Graham and Bret) pose outside the Pittsfield branch of the Ann Arbor District Library, where they collected points for the Summer Game.

Summer in Ann Arbor, Mich., means thousands of people hunting for hidden codes around the city and reading books to earn points. It's part of a popular game organized by the public library.

(Image credit: Neda Ulaby)