Roger's eccentric, junk-collecting friend Kenneth takes him on an awesome undersea ride in a homemade submarine. Their visit to a subaqueous cavern turns up a wonderful surprise: a cache of supervaluable baseball cards!
- ISBN10 0780712072
- ISBN13 9780780712072
- Publish Date 1 August 1991 (first published 1 January 1991)
- Publish Status Out of Print
- Out of Print 13 September 2021
- Imprint Perfection Learning
- Format Hardcover (Library Binding)
- Pages 47
- Language English