There's a particular kind of Sunday that belongs entirely to the used bookshop — the kind where you go in for one thing and come out an hour later with six books you didn't know you needed and a vague sense of having lived better. This week we wander through the culture of secondhand books: the browsers versus the hunters, the penciled annotations left by strangers, and why these slightly chaotic, dust-smelling rooms feel like one of the last genuinely unhurried places on earth.