Stratemeyer Syndicate

The Stratemeyer Syndicate was a publishing company that produced a number of mystery book series for children, including Nancy Drew, The Hardy Boys, the various Tom Swift series, the Bobbsey Twins, the Rover Boys, and others. It published and contracted the many pseudonymous authors who wrote the series from 1899 to 1987, when it was sold to Simon & Schuster. Provided by Wikipedia