Roger's friend Kenneth uses an unusual sea vehicle of his own design to take them to an underwater cave, where a cache of old loot gathered by the mermaids turns out to contain a lot of very valuable old baseball cards.
- ISBN10 0679915699
- ISBN13 9780679915690
- Publish Date 27 January 2004
- Publish Status Remaindered
- Publish Country US
- Imprint Random House USA Inc
- Edition Library edition
- Format Hardcover
- Pages 47
- Language English