The document provides an overview of film noir, including its origins, key characteristics, and classification. It discusses how film noir emerged as a distinct style in American films of the 1940s, influenced by events like the Great Depression, WWII, and hardboiled crime fiction. It also notes the ongoing debate around whether film noir qualifies as a distinct genre or is more of a mood or tone. The document aims to introduce noir aficionados to the topic through various definitions, quotes, and classifications of film noir.