Given the question: Information: - Nancy Drew is a fictional American character in a mystery fiction series created by publisher Edward Stratemeyer. The character first appeared in 1930. The books are ghostwritten by a number of authors and published under the collective pseudonym Carolyn Keene. Over the decades, the character evolved in response to changes in US culture and tastes. The books were extensively revised and shortened, beginning in 1959, in part to lower printing costs and to eliminate racist stereotypes, with arguable success. In the revision process, the heroine's original character was changed to be less assertive and more feminine. In the 1980s, an older and more professional Nancy emerged in a new series, "The Nancy Drew Files", that included romantic subplots for the sleuth. The original "Nancy Drew Mystery Stories" series started in 1930, and ended in 2004. Launched that same year, the "Girl Detective" series features Nancy driving a hybrid electric vehicle and using a cell phone. In 2013, the "Girl Detective" series ended, and a new current series called "Nancy Drew Diaries" was launched. Illustrations of the character evolved over time to reflect contemporary styles. The character proves continuously popular worldwide: at least 80million copies of the books have been sold, and the books have been translated into over 45 languages. Nancy Drew is featured in five films, two television shows, and a number of popular computer games; she also appears in a variety of merchandise sold around the world. - The thirteenth book in the Stephanie Plum mystery series ; which includes four novellas in addition to the nineteen chronologically titled novels . This book was released on June 19 , 2007 . - Janet Evanovich (born Janet Schneider; April 22, 1943) is an American writer. She began her career writing short contemporary romance novels under the pen name Steffie Hall, but gained fame authoring a series of contemporary mysteries featuring Stephanie Plum, a former lingerie buyer from Trenton, New Jersey, who becomes a bounty hunter to make ends meet after losing her job. The novels in this series have been on "The New York Times", USA Today, "Wall Street Journal" and Amazon bestseller lists. Evanovich has had her last seventeen Plums debut at #1 on the "NY Times" Best Sellers list and eleven of them have hit #1 on "USA Today" Best-Selling Books list. She has over two hundred million books in print worldwide and is translated into over 40 languages. - Stephanie Plum is a fictional character and the protagonist in a series of novels written by Janet Evanovich. She is a spunky combination of Nancy Drew and Dirty Harry, and although a female bounty hunter is the opposite of Domino Harvey. She is described by the author as "incredibly average and yet heroic if necessary." What is the relationship between 'lean mean thirteen' and 'janet evanovich'?
The answer is:
author