People in Adenville are breathing a sigh of relief. It seems that Tom D. Fitzgerald, the Great Brain, has truly reformed. For months, not one kid has been swindled and not one stunt has been pulled. But when he gets a new bike for Christmas, the Great Brain heads full speed into his old ways. And this time his ideas are bigger than ever. He puts all of Adenville in fear of a prehistoric beast from Skeleton Cave, solves a mysterious bank robbery, and...

In the absence of his older brother, the Great Brain, J.D. finds that his own little brain can accomplish feats on a somewhat lesser scale.

The exploits of the Great Brain of Adenville, Utah, are described by his younger brother, frequently the victim of the Great Brain's schemes for gaining prestige or money.

This fifth book in the series is a great combination of The Adventures of Tom Sawyer and The Terrible Two series, and is perfect for fans of Roald Dahl.
It's summer vacation, and  J. D. is determined to reform his older brother Tom, a.k.a. the Great Brain, from his money swindling ways for good.

This fourth book in the series is a great combination of The Adventures of Tom Sawyer and The Terrible Two series, and is perfect for fans of Roald Dahl.
Everyone knew that Tom Fitzgerald, better known as the Great Brain, would get into trouble when he went off to boarding school at the strict Catholic Academy for Boys. But no one—including Tom—knew just how much! Whether he's running an illegal candy store or earning...

This seventh book in the series is a great combination of The Adventures of Tom Sawyer and The Terrible Two series, and is perfect for fans of Roald Dahl.
Here he goes again! Tom, a.k.a. the Great Brain, comes up with many more schemes, most of them concerned with earning money.