Sarah was born in Montreal, Canada. After graduating with an honors degree in English literature from McGill University, she moved to Toronto to work for Harlequin Enterprises. While she never met Fabio, she used her romance publishing experiences to fuel her first novel MILKRUN.
Since then, Sarah has written? four additional novels for adults: FISHBOWL, AS SEEN ON TV, MONKEY BUSINESS and ME VS. ME; the New York Times bestselling middle grade series Whatever After; and the teen novels BRAS & BROOMSTICKS, FROGS & FRENCH KISSES, SPELLS & SLEEPING BAGS and PARTIES & POTIONS—all in the ‘Magic in Manhattan’ series, as well as GIMME A CALL, TEN THINGS WE DID (AND PROBABLY SHOULDN'T HAVE) and DON'T EVEN THINK ABOUT IT. Along with Lauren Myracle and E. Lockhart, Sarah also wrote HOW TO BE BAD, and along with Farrin Jacobs, she wrote a guide to writing called SEE JANE WRITE. Sarah also co-edited two bestselling charity collections (GIRLS' NIGHT IN and GIRLS' NIGHT OUT), and contributed to various anthologies (AMERICAN GIRLS ABOUT TOWN, SIXTEEN: STORIES ABOUT THAT SWEET AND BITTER BIRTHDAY, 21 PROMS, FIRST KISS (THEN TELL), FIREWORKS and VACATIONS FROM HELL).
Sarah's books have been translated into twenty-nine languages and optioned to Hollywood. She now lives in New York City with her husband and two daughters.