20,000 Baseball Cards Under the Sea
, by BULLER, JON- ISBN: 9780679815693 | 0679815694
- Cover: Paperback
- Copyright: 8/27/1991
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!