When Professor Williams comes in, he tells the students there is no syllabus. They have one assignment. A girl is missing and if they can't find her before the end of the class, she will be killed. The students will receive clues every week and the class time will be devoted to figuring out what they have done and discovered from the clues. The first clue is that the girl's name is Polly and she disappeared recently from their town.
The class is agog. Is this real? Is there really a girl out there who needs their help? Why hasn't the professor gone to the police? Mary and two male students, Dennis and Brian, start to work together to see what they can discover. They are soon caught up in a mire of misdirection and suspicious circumstances. It appears that a girl has gone missing, or is it two girls? What are their connections with Professor Williams? Is he part of the crime?
This is an interesting book. There are more twists and turns than one can imagine and all the time there is a clock ticking. Is this girl real? What is her connection to the professor? Who are the good guys and who is dangerous? Readers will be drawn into the mystery as it changes from one moment to the next. This book is recommended for mystery readers.