Lisi Harrison is a #1 New York Times bestselling author. She was born on July 29, 1970, in Toronto, Canada. In 2003, Lisi left her position as senior director of development at MTV Networks to write The Clique series (2003-2011), which sold more than eight million copies and was on the New York Times bestseller list for more than two hundred weeks. Ten titles hit #1, and foreign rights were sold in thirty-three countries. Alphas was a #1 New York Times bestseller, and Monster High was an instant bestseller.

In 2013, Lisi released her YA series Pretenders and her first adult novel, The Dirty Book Club in 2017. In 2021, Lisi launched two new middle-grade series—Girl Stuff and The Pack. Currently, she is working on a middle-grade series with New York Times bestselling author Daniel Kraus called Graveyard Girls (9.6.22).

Lisi lives in Laguna Beach, California, where she leads Drama Free Friend workshops that teach kids, and their parents, how to have healthy, drama-free friendships.