Book excerpt: Day after day, year after year, the lightbulb did not burn out. Here is the true story of a little lightbulb, located in a firehouse, that has stayed lit for more than one hundred years. As horse-drawn carriages make room for automobiles, dirt roads give way to paved streets, and new buildings transform small clusters of homes into bustling neighborhoods, a small town grows and changes. And fighting fires changes, too: fires once fought by bucket brigades and hand-pulled hose carts are now attended by full-time firefighters and modern firetrucks. Yet now, just like then, the lightbulb glows, strong and steady, above the brave firefighters and their trucks.