The Money Tree: Adventures of the West Main Five

The McPierson family has recently moved to Washington. Tom, aged 10, and his 8-year-old sister, Jamie, are excited to meet new friends. They soon form a club - The West Main Five -and discover a clue to a 25-year-old mystery Using the library to research for more information, they begin to put together an intriguing puzzle. Will the club solve the mystery which has baffled the police for years? Who is the mysterious man whio seems so interested in them? Where is the missing robbery loot?