Price Stern Sloan, often abbreviated as PSS!, was a publishing company that originated as a niche publisher of novelty books in Los Angeles, California. It was founded by Roger Price, Leonard Stern, and Larry Sloan in 1960. The company is well-known for popularizing the "Mad Libs" series, a humorous word game where players fill in blanks with parts of speech to create funny stories. Over the years, Price Stern Sloan expanded its catalog to include a variety of humorous and children’s books, as well as puzzles and games. Eventually, the company became an imprint of Penguin Group, one of the largest publishing companies in the world, where it continued to publish unique and engaging titles for a diverse audience.