The Case of the Pizza Pie Spy(1990)
(The fourth book in the Clues Kids series)
A novel by William Alexander
While searching for a bike thief, the Clues Kids, five foster children living with Chief Klink and his wife, investigate the suspicious activities at a local pizza parlor.
Used availability for William Alexander's The Case of the Pizza Pie Spy
July 1990 : USA Library Binding
January 1990 : USA Paperback