Why the Lights Go Off at 3pm

Every day at exactly 3pm, the lights in our apartment building switched off for precisely one minute. The electricity company claimed it was not their doing. The building manager said he had no idea why. I decided to investigate, because I am eleven years old and I read a great many detective novels. I timed it carefully: 3pm exactly, every single day, including weekends. I examined the electricity meter room and discovered footprints in the dust — small footprints, far...