The fantastic secret of Owen Jester / by Barbara O'Connor.
After Owen captures an enormous bullfrog, names it Tooley Graham, then has to release it, he and two friends try to use a small submarine that fell from a passing train to search for Tooley in the Carter, Georgia, pond it came from, while avoiding nosy neighbor Viola.
New York :
Farrar, Straus and Giroux,
Walker Library - Curriculum Collection - Juvenile - 3rd Floor
Pull and Hold