I took these pictures in 2nd ST, Long Beach, CA, last weekend.
I´m happy to personally see this book swap, it´s my first time. I´ve read about the books interchange in bus stops, in Israel, Spain and also there are special days in Argentina (not everywhere, in Buenos Aires and some provinces) where you can find books in the streets, even on the sidewalk, you can take them but have the obligation to leave yours.
It is a great idea, isn´t it?
Here, an article about the subject in Israel, in Spanish (there´s a translator on the right side of the blog):
The source, in English: