The Gymnastics Mystery
by Gertrude Chandler Warner | 
The Finders Keepers Mystery
by Gertrude Chandler Warner | 
The Comic Book Mystery
by Gertrude Chandler Warner | 
The Radio Mystery
by Gertrude Chandler Warner | 
The Ice Cream Mystery
by Gertrude Chandler Warner | 
The Tattletale Mystery
by Gertrude Chandler Warner | 
The Midnight Mystery
by Gertrude Chandler Warner | 
The Poison Frog Mystery
by Gertrude Chandler Warner | 
The Basketball Mystery
by Gertrude Chandler Warner | 
The Great Bicycle Race Mystery
by Gertrude Chandler Warner | 
The Guide Dog Mystery
by Gertrude Chandler Warner | 
The Growling Bear Mystery
by Gertrude Chandler Warner | 
The Panther Mystery
by Gertrude Chandler Warner | 
Caboose Mystery
by Gertrude Chandler Warner | 
The Pizza Mystery
by Gertrude Chandler Warner | 
The Great Shark Mystery
by Gertrude Chandler Warner | 
The Mystery of the Empty Safe
by Gertrude Chandler Warner | 
The Firehouse Mystery
by Gertrude Chandler Warner | 
Bicycle Mystery
by Gertrude Chandler Warner | 
The Ghost Town Mystery
by Gertrude Chandler Warner |
Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather, and they'??re going to visit his old school with him! The Aldens are spending a weekend at Goldwin University for Grandfather'??s college reunion. The Alden children are immediately fascinated by the tall, mysterious clock tower that overshadowed the campus. They soon learn the valuable secret from the past lies hidden somewhere at the old school'??and they think the clock tower might hold the key to discovering it! But there are strange lights coming form the clock tower at night. Is the tower haunted by ghosts of the past? Or is someone else searching for the secret of Goldwin University? The Boxcar Children are convinced that someone at the school is not what he or she seems'??and they are determined to find out who it is!
