From his window in a Jerusalem hospital, Daniel Green and his friends can watch the strange behavior of a blind beggar who sits near a park bench across the street. What is the beggar's secret? Who is the mysterious man who comes every day, snatches something hidden behind the bench, then hurries away?

Fascinated by these suspicious activities, the three boys become first-class detectives. With the help of their grown-up friend, Mr. Berger, they follow one clue after another - until an alarming, treacherous plot is revealed! Can they stop it in time?

A suspenseful tale of secret codes, clever logic and bold action, Room 210 will intrigue and entertain readers from age 9 and up. But first they will have to get it away from their parents!