It is a spin-off of the original series of novels featuring Nancy Drew, with a greater emphasis on adventure, malice and romance.
More than 17 million copies are in print and the books have appeared on the bestseller lists of Publishers Weekly, B. Dalton, and Waldenbooks.
Nancy's companions are usually her friends Bess Marvin and George Fayne, no matter whether she is sleuthing or shopping.
The series was first introduced in two books from the Nancy Drew Mystery Stories, #77: The Bluebeard Room, and #78: The Phantom of Venice.
The publishers soon launched The Nancy Drew Files concurrent to the original series, to aim for more mature readers.
The series featured a college-aged Nancy, who moved to New York City, to attend college and live with Bess (who was an advice columnist) and George (a mail carrier, and amateur filmmaker).
Four additional titles of The Nancy Drew Files were planned, three of them rewritten as entries for the original series.