In this future-set novella by bestselling author Scott Westerfeld, Kieran Black lives in a "perfect" world. Disease and starvation have been eradicated, sleep is unnecessary, and it takes no time at all to go from the Bahamas to the moon. But now Kieran has to take Scarcity, a class about how people lived in the bad old days. And as if sitting through an hour of Scarcity every day wasn't depressing enough, it's final projects time. Each student must choose some form of ancient hardship to experience for two whole weeks. Kieran chooses having to sleep eight hours a night, which doesn't seem too annoying.Maria Borsotti has never thought much of Kieran, but she decides to take pity on him and help him out with his project. Soon, Kieran is sleeping and having vivid dreams, while Maria, whose Scarcity project is to give up all teenage hormone regulation, is experiencing emotions she never knew she had. As their assignments draw them closer together, they begin to wonder if the olden days weren't so bad. Maybe something has been missing from their perfect lives after all?