Written in 1926, "Cool Air" is H. P. Lovecraft's exploration of obsession, decay, and the terrible price of defying mortality. The narrator recalls his encounter with Dr. Muñoz, a brilliant but reclusive physician living in a squalid New York boarding house, whose desperate battle against death through unorthodox scientific methods leads to increasingly grotesque consequences. The story examines the narrator's inexplicable fear of cold air and what he witnessed in the doctor's artificially frigid sanctuary.