[no spoilers] Having read (and enjoyed) Westerfeld's 'Leviathan', I had hoped this novel would yet another of those 'Young Adult'-book that would be just as suitable for adults, like Philip Reeve's brilliant 'Mortal Engines'-series or Philip Pulman's 'Dark Material', knowing full well 'So Yesterday' would have no fantastic elements. Unfortunately (for me), it turned out to be a book for 10-16 year olds, not for adults. This short novel is smart and addresses an important contemporary issue: the slavish support of commercial brands by children and teens. The plot is simple and straight forward and repeating or summarizing it would give too much away. I had hoped it would carry a different message, but maybe it is stronger because it doesn't; I'll leave that for teens to decide themselves.