In 2015, a leaky roof and faulty HVAC system at the Mark Twain House & Museum led to a mold infestation that affected at least 5,000 artifacts, including first editions of the famous author’s books, translations and other documents of interest. The institution was not alone with its condensation control problems. In 2016, the Carnegie Library at Mount Vernon closed its doors when it discovered mold. Each year, libraries around the world battle the damaging effects of mold, making it one of the greatest problems that the knowledge centers face. While the closure of larger libraries and archives are a public inconvenience, incidents that occur at schools affect the quality of education that young people receive. Because schools often close for long periods, their libraries are particularly vulnerable to mold.