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 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.
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.