The Mystery of the Old Knife

by M J Cosson

Published 1 January 2000

The Mystery of Apartment A-13

by M J Cosson

Published 1 January 1998
Ty and Gabe hear yelling and screaming and someone very bad laughing in apartment A-13.



The Mystery of Mr. Dodge

by M J Cosson

Published 15 August 1998

The Mystery of the PB & J Jam

by M J Cosson

Published 1 January 2001

The Mystery of the Gross Gift

by M J Cosson

Published 1 January 1999

Big Ben helps the Kooties Club members with their science projects.