Brody graduated from Smith College in 2001 with a double major in Economics and French and worked for MGM Studios as a financial analyst until 2005, when she began to develop her career as a full-time author.

[1][2] She credits Bridget Jones's Diary with reigniting her childhood passion for writing: "I was so inspired and awed by the fact that a book could take me away from my life like that."

[3] While most of Brody's books are for teens, her first two published novels, The Fidelity Files and Love Under Cover, were women's fiction for adults.

[7] Brody sold the publishing rights for her first middle-grade novel, Addie Montgomery's Shortcut to Growing Up, to Delacorte Press in 2015.

Brody and fellow author Joanne Rendell developed the System Divine series, the first book of which, Sky Without Stars, was published in March 2019.