The Library Book

by Susan Orlean

In the physics of fire, there is a chemical phenomenon known as a stoichiometric condition, in which a fire achieves the perfect burning ratio of oxygen to fuel—in other words, there is exactly enough air available for the fire to consume all of what it is burning. Such a ratio creates an ideal fire situation, which results in total, perfect combustion. A stoichiometric condition is almost impossible to create outside of a laboratory. It requires such an elusive, precise balance of fuel and fire and oxygen that, in a sense, it is more theoretical than actual. Many firefighters have never seen such a blaze and never will. Not long ago, I had coffee with a man named Ron Hamel. He is now an arson investigator, but at the time of the library fire, Hamel was a captain in the fire department. Although over thirty years have passed, he remains awed by what he saw that day at the library. He talked about it like someone might talk about seeing a UFO. In his decades with the department, Hamel fought thousands of fires, but he said he never experienced another that was as exceptional as the fire at Central Library. Usually, a fire is red and orange and yellow and black. The fire in the library was colorless. You could look right through it, as if it were a sheet of glass. Where the flame had any color, it was pale blue. It was so hot that it appeared icy. Hamel said he felt like he was standing inside a blacksmith’s forge. “We thought we were looking at the bowels of hell,” he said,...