What can a cashier learn about us from the things we buy, what we say, the questions we ask? Paying at the cash register is in fact a very special moment. Mistakenly believing the experience a neutral one, we pay no attention. The person sitting at the register might as well be blind, almost a machine. So we reveal ourselves, unguarded. Yet when the cashier in question is named Anna Sam, has a Bachelor's in literature, and likes to keep her eyes and mind open, then our white lies, little acts of cowardice, and eccentric habits are recorded and analyzed. The result is a book like no other.