The assignment was to spend a whole day, up to 24 hours, in a place of our choice, cameras in hand, taking photographs. 

I chose an amazing bookstore in Buenos Aires. There, I discovered that a great photo isn't about snapping pictures like crazy but about waiting for the moment to unfold, for people to act naturally, and for the unexpected to happen. 

Here are some of my best shots, each with a little caption explaining them.