K.M. (Karl) Soehnlein (born November 24, 1965) is the American author of the novels The World of Normal Boys (2000), a 1970s coming-of-age story that won the Lambda Literary Award for Gay Men’s Fiction; You Can Say You Knew Me When (2005), set in San Francisco during the Beat era of 1960 and the dot-com boom of 2000; and Robin and Ruby (2010), which follows the brother and sister characters of The World of Normal Boys into the mid-1980s.