The Rover Boys, or The Rover Boys Series for Young Americans, was a popular juvenile series written by Arthur M. Winfield, a pseudonym for Edward Stratemeyer. Thirty titles were published between 1899 and 1926 and the books remained in print for years afterward. The original Rover Boys were brothers Tom, Sam, and Dick Rover, the sons of wealthy widower Anderson Rover, who entrusted his brother and sister-in-law, Randolph and Martha, with the rearing of the boys. As the series progressed the brothers became smitten with Dora Stanhope and Nellie and Grace Laning, the daughter and nieces of a wealthy widow. The Rover boys' children (Fred, son of Sam Rover; Jack, son of Dick; Andy and Randy, twin sons of Tom) became the main characters of the "second series" that began with Volume 21, The Rover Boys at Colby Hall, published in 1917. The elder Rovers continued making appearances in the second series. Additionally, there was a related Putnam Hall series of six books that featured other characters from the first Rovers series, although the Rovers themselves do not appear. The Rovers were students at a military boarding school: adventurous, prank-playing, flirtatious, and often unchaperoned adolescents who were frequently causing mischief for authorities, as well as for criminals. The series often incorporated modern technology of the era, such as the automobile, airplanes (The Rover Boys in the Air) and news events, such as World War I. The earliest volumes focused on the boys' travel adventures, but later stories were filled with mystery and suspense. Publishers From 1899 to 1906 The Mershon Co. published volumes 1 through 11; from 1906 to 1907 Chatterton-Peck Co. published volumes 1 through 11. Starting in 1907 Grosset & Dunlap began publishing the Rover Boys, eventually printing all 30 volumes. They published the series through at least the 1930s. Starting in the 1940s Whitman Publishing reprinted volumes 1, 2, 7, 8, 10, 11, 13 and 14. Legacy More than a million Rover Boys books were sold, and the titles remained in print by Grosset & Dunlap and later Whitman for years after the final title was published. The most commonly encountered are the green and brown cover editions published by Grosset & Dunlap during the 1910s and 1920s. While there are better-known and longer-running juvenile series such as The Hardy Boys, Nancy Drew, and Tom Swift, the Rovers were very successful and influential. They established the template