Lilian C. Garis, born Lilian C. McNamara (20 October 1873 - 19 April 1954) was an American author who wrote hundreds of books of juvenile fiction between around 1915 and the early 1940s. Prior to this, she was a reporter for the Newark Evening News in New Jersey. Garis and her husband, Howard R. Garis, were possibly the most prolific children's authors of the early 20th century. For the Stratemeyer Syndicate she wrote under the pseudonym Margaret Penrose and Laura Lee Hope, with her works including some of the earliest books in the Bobbsey Twins series as well as the Dorothy Dale series. But Mrs. Garis also wrote some books under her own name. Her husband, Howard Roger Garis was also a Syndicate writer and DJ on WNJR. Her children Roger and Cleo also wrote juvenile fiction.