While visiting their friend Wallis and her adopted daughter on Mount Desert Island, Maine, Josh, Dink, and Ruth Rose investigate why three white wolf cubs were stolen, and by whom.
While searching in Iceland for a missing sailor sought by an insurance company, the teen-age detective brothers uncover a plot threatening the life of a United States astronaut and the secrets of NASA's moon project.
The Hardy brothers' search for the missing son of a wealthy industrialist leads them to Brazil and great danger.
While searching for the guard end of a broken saber that will solve one mystery, the Hardy brothers become involved with a gang of bank robbers.
After recovering his mom's purse, Franklin decides to put his detective skills to work for his friends.
The Hardy brothers embark on a freighter trip under mysterious circumstances and find themselves involved with a smuggling ring.
On a winter vacation in Jamaica the Hardy boys begin a dangerous adventure when an ancient bronze death mask is discovered near their beach house.
During their father's investigation of a ruthless gang of terrorists, two young detectives face several adversaries.
Nancy Drew and her friends solve a mystery of the strange tapping sounds in the house of a retired actress involving an invalid, cats, and tap dancing.
On her first day of fifth grade, Cam Jansen uses her photographic memory to help the police find a car thief. Includes a memory game.
The Hardy boys find the missing deed to an Indians' land, prevent a phony salesman from carrying through a reckless scheme, and help their father solve a top-secret case.
A chance meeting with a stranger on the road provides the Hardy brothers with a clue to a gang of local burglars.
The Hardy brothers' visiting Greek pen pal enlists their help in searching for a priceless ancient Greek helmet loaned to and lost by a Hollywood movie company years before.
The Hardy boys dial a wrong number, get the Pentagon, and suddenly find themselves in a dangerous adventure involving national security.
When their peregrine falcon brings down a homing pigeon carrying rubies, the Hardy brothers find themselves involved with kidnappers.
The search for missing gold takes the Hardy boys to the Yucatan Peninsula where they uncover a second mystery.
Nancy Drew becomes involved in a double mystery concerning a haunted bridge and jewel thieves.