Sarah is the bestselling author of the WHATEVER AFTER, UPSIDE-DOWN MAGIC (along with Emily Jenkins and Lauren Myracle), and MAGIC IN MANHATTAN series, as well as DON'T EVEN THINK ABOUT IT, THINK TWICE, MILKRUN, FISHBOWL, AS SEEN ON TV, MONKEY BUSINESS, GIMME A CALL, TEN THINGS WE DID (AND PROBABLY SHOULDN'T HAVE), and HOW TO BE BAD (along with E. Lockhart and Lauren Myracle). Sarah's short stories and novellas include A LITTLE BIT BROKEN, A NICE FLING IS HARD TO FIND, KNOW IT ALL and CRUISIN'. Sarah also co-edited the bestselling chick-lit collections GIRLS' NIGHT IN and GIRLS' NIGHT OUT and co-wrote the first ever guide to writing chick lit, SEE JANE WRITE.
Sarah's books have been translated into twenty-one languages and optioned to Hollywood. She was born in Montreal but now lives and writes in New York City.