Ever feel like you’re being watched on public transportation? Maybe you’ve been spotted by The Book Spy.

This anonymous New York City blogger explained in a post: “Every day, I spend nearly two hours in a dank, dark box hurtling through tunnels under the ground. It is my curse, but also my blessing. In the subway I’m exposed to a culture of readers unequaled elsewhere. They flip through magazines, shuffle through print-outs, and contort their newspapers into elaborate origami folds to keep the pages from encroaching upon their neighbors. Above all they read books. Books of every shape, size, genre, and format.”

Descriptions include book title, author, MTA subway line, and a description of the reader. Some recent books spotted: The Girl Who Played with Fire by Stieg Larsson, The Wind-Up Bird Chronicle by Haruki Murakami, and the Bible.

UPDATE: Julie Wilson has been documenting readers on public transportation for many years on Seen Reading.