Last year saw the rediscovery of a major figure whose remarkable story illustrated the secret history of gay life throughout the 20th Century. In Secret Historian: The Life and Times of Samuel Steward, Professor, Tattoo Artist, and Sexual Renegade, author Justin Spring tells the thrilling tale of Sam Steward, a man who documented every one of his many sexual exploits in obsessive detail, providing a wealth of understanding to future generations looking to understand the pre-Stonewall era. Now the artifacts of Steward’s life have been collected and displayed in a brilliant, inspiring show at the Museum of Sex in New York City. Keep the Lights On‘s documentarian Onur Karoaglu asked Justin Spring to show him around the exhibition one morning a few weeks ago. Secret Historian, along with An Obscene Diary: The Visual World of Sam Steward is in bookstores now.