"Amateur sleuths Frank and Joe Hardy investigate a counterfeit operation while their detective father is connected to a secret case involving national security. An old mill on the outskirts of town appears to hold the key to solving both crimes"-- "Amateur sleuths Frank and Joe Hardy investigate a counterfeit operation while their detective father is connected to a secret case involving national security. An old mill on the outskirts of town appears...

"Now with a brand-new look, this is an edition that collectors won't want to miss! In Hunting for Hidden Gold, the fifth book in the incredibly popular, long-running series, Frank and Joe Hardy pursue a notorious gang responsible for a payroll robbery. A special treat for Hardy Boys fans and any reader who's new to the series!"--

Emotionally crippled by his obsessive-compulsive disorder, teenager Matthew Corbin rarely leaves his room on a cul-de-sac in London, and he passes the day observing and writing down his neighbors doings from his window--but when a toddler staying next door disappears Matt is the key to solving a mystery and possibly saving a child's life...if he can manage to expose himself, and his secret guilt to the outside world.

The search for missing gold takes the Hardy boys to the Yucatan Peninsula where they uncover a second mystery.

Encyclopedia Brown solves ten mysteries, from recovering a client's prized tooth collection, to following a trail of paint to find a sneaky thief, and more.

After Minty discovers a secret tree with a hollow trunk that holds the secrets of everyone in the neighborhood, Raymond, a new boy drawn to the tree and Minty start watching their neighbors.

Falsely accused of plotting to overthrow King Claudio, scholarly Mangus the magician, along with his street-smart servant boy, Fabrizio, face deadly consequences unless they can track down the real traitor by the stroke of midnight.

When Allie is contacted by the ghost of a dog, she and Dub investigate the surly new boy at school and his father, who may be running a puppy mill, to see if they are involved.

When brothers Simon, Henry, and Jack move with their parents to Arizona, they are irresistably drawn to explore the aptly named Superstition Mountain, in spite of warnings that it is not safe.