"The file doesn't allow you to close it," Nash wrote in his final message. "You don't read Las que no duermen . It reads you."

This information would help in providing a more accurate and helpful response.

The screen flickered. A map appeared, showing seven other dots in the city. Seven other women, awake, reading, watching. The file was no longer an .epub . It was a lifeline.

And somewhere in the digital ether, the user Nash logged off, leaving Maya to her shift in the city that never truly sleeps.