The sequels Jessica Darling's It List #2: The (Totally Not) Guaranteed Guide to Friends, Foes & Foe Friends and Jessica Darling's It List #3: The (Totally Not) Guaranteed Guide to Stressing, Obsessing and Second Guessing were published in September 2014 and June 2015. The first of the novels, Jessica Darling's It List #1: The (Totally Not) Guaranteed Guide to Popularity, Prettiness & Perfection was published on September 3, 2013.

McCafferty announced in 2012 that she would be publishing a new Jessica Darling prequel series titled It List, aimed at middle-grade readers. ' in a anthology called Sixteen: Stories About That Sweet and Bitter Birthday, which she also edited. McCafferty also published a Jessica Darling short story called 'Fifteen Going On. A Sloppy Firsts stage play inspired by the first book in the series premiered at Round House Theater in March 2018. The third, fourth and fifth books all made the New York Times Best Seller List. Perfect Fifths, the fifth and final Jessica Darling novel, is the only book in the series told in third person from the alternating perspectives of Jessica Darling and her long-time love, Marcus Flutie.

This was later followed by Charmed Thirds (April 11, 2006), Fourth Comings (August 7, 2007), and Perfect Fifths (April 14, 2009).

McCafferty subsequently published Second Helpings on April 22, 2003. Told from the diary-style perspective of character Jessica Darling herself, the series chronicles her misadventures through high school, college, and beyond. McCafferty's first novel, Sloppy Firsts, was published on August 28, 2001. She began her writing career with writing short stories and articles for various teen magazines. After graduation, McCafferty worked in magazine publishing as an editor for Cosmopolitan, YM, and Fitness magazines. McCafferty attended the University of Richmond before transferring to Columbia University to earn a bachelor's degree in English. She graduated from Central Regional High School in Berkeley Township, New Jersey in 1991. McCafferty hails from the Bayville section of Berkeley Township, New Jersey, and moved to Brooklyn and Manhattan before settling in Princeton, New Jersey. McCafferty gained international attention in 2006 when novelist Kaavya Viswanathan was accused of plagiarizing the first two Jessica Darling novels. Megan Fitzmorris McCafferty (born 1973) is an American author known for The New York Times bestselling Jessica Darling series of young adult novels published between 20.

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