Mallory A. Kass, better known by the pen name Kass Morgan, is an American author and editor, best known for her work on The 100, a dystopian science fiction book series for young adult readers.

She pursued her education at Brown University, majoring in English and History, and furthered her studies with a Master's degree at Oxford in 19th century literature.

Currently residing in New York City, she works as a senior editor at Scholastic. Kass Morgan also made an appearance as a contestant on Jeopardy! on May 10, 2022.