So Yesterday is a young adult suspense novel by Scott Westerfeld published in 2004.

It has won a Victorian Premier's Award[4] and is also an ALA Best Book for Young Adults.

[5] So Yesterday, the author's third publication, is considered his "breakout novel" and has been optioned to be made into a film by one of the producers of Fahrenheit 9/11 and Bowling for Columbine.

His latest find is Jen, an honest-to-goodness 'Innovator' whom he spots based on her unique shoelaces.

Together they are drawn into a mystery when one of Hunter's bosses disappears after she runs a 'cool tasting' for a new brand of shoe.