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!