Sarah Weeks is an American writer of children's books, perhaps best known for the novel So B. It, which has won several juvenile literature awards. In 2007, it received the Rebecca Caudill Young Reader's Book Award and the William Allen White Children's Book Award.

Sarah has been writing children’s books and songs for the past twenty years. She is a graduate of Hampshire College and NYU and recently became an adjunct faculty member in the prestigious Writing Program at the New School University, in New York City.

Her first YA novel, So B. It, appeared on the LA Times bestseller list and was chosen as an ALA Best Book for Young Adults, receiving the 2004 Parent’s Choice Gold Award. In addition to being an author, Sarah is an accomplished singer/songwriter. She has written for television, stage, and screen, and a number of her picturebooks include songs which she both writes and sings for the accompanying CDs. Sarah's titles have sold well over a million copies, including several foreign editions.