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 ended in 2012. The Nancy Drew Diaries was launched in its place in 2013. Source: Wikipedia (en)