On April 29, 1986, firefighters in Los Angeles battled one of the most devastating library fires in modern history when Los Angeles Central Library erupted in flames. The inferno burned for more than seven hours, reaching temperatures so intense that steel bookshelves warped and parts of the historic building suffered severe structural damage.

By the time the fire was finally extinguished, more than 400,000 books had been completely destroyed, while another 700,000 volumes were damaged by smoke, heat, and the millions of gallons of water used to fight the blaze. It was the largest library fire in the United States since the Library of Congress fire of 1851.

What followed was one of the most ambitious book-rescue efforts ever attempted. Librarians, conservators, and thousands of volunteers rushed to save damaged collections by freezing wet books at temperatures below -20°C (-4°F) to stop mold from growing. Many of the books were later vacuum freeze-dried—a preservation technique normally used to recover water-damaged historical documents.

Investigators strongly suspected arson, and actor Harry Peak became the primary suspect after making a series of suspicious statements. However, despite years of investigation, no one was ever convicted, and the fire’s exact cause officially remains unsolved.

Today, the Los Angeles Central Library stands fully restored, serving as a reminder that preserving humanity’s knowledge can sometimes require as much courage and determination as creating it.