The Nancy Drew Mystery Stories is the long-running "main" series of the Nancy Drew franchise, which was published under the pseudonym Carolyn Keene. There are 175 novels — plus 34 revised stories — that were published between 1930 and 2003 under the banner; Grosset & Dunlap published the first 56, and 34 revised stories, while Simon & Schuster published the series beginning with volume 57. A spinoff, the Nancy Drew Files, ran concurrently from 1986 to 1997. In 2003, Simon & Schuster announced that Nancy Drew Mystery Stories would end and be replaced by a new, more contemporary series titled Nancy Drew: Girl Detective. Launched in 2004, the series was panned in comparisons to its predecessor, and ended in 2012. The Nancy Drew Diaries was launched in its place in 2013, and has received mixed reviews. Source: Wikipedia (en)