When Ra-Orkon, a 3,000-year-old mummy, begins to whisper strange words in an ancient Egyptian tongue, the Three Investigators are determined to find out the facts: Why is he speaking? What is he saying? And how is the horrible curse of Ra-Orkon about to be fulfilled? Originally published in hardcover beginning in 1964, these classic mystery/adventure stories feature three boys—Jupiter Jones, Pete Crenshaw, and Bob Andrews—who establish a detective firm with the motto "We Investigate Anything!" Perfect for summer reading, these suspenseful action stories will appeal to both boys and girls.

Why did Cameron paint twenty pictures of the shrinking house and where did they go after his death? Three searchers must crack this tough nut if they don't want to disappoint the young countess' trust...

While picking up a load of junk, the boys acquire a trunk from an old ship. A journal from a crewman is hidden in the trunk, giving clues to find a treasure that he hid before his death.

A green ghost oozes through the walls of a crumbling old mansion, leading The Three Investigators to an open coffin and a grinning skeleton wearing a string of priceless Chinese Ghost Pearls. When the ghost disappears—along with the pearls—the sleuths are off on their strangest case ever!

Three young sleuths discover who is haunting a mysterious old mirror—and why.

Missing: One fabulous, jewel-encrusted belt, once owned by the ancient emperors of Japan. The Three Investigators are ready to jump into action, but officials at the Peterson Museum turn them away for being too young. Then a strange twist of fate brings Jupe, Pete, and Bob on the case, and the boys are soon surrounded by master criminals—who will stop at nothing to hold on to their stolen fortune! Is the priceless belt lost for good, or will the Three Investigators be able to save the day?

The three young sleuths solve a case of double identity while investigating the legend of Monster Mountain.

Skeleton Island is the next stop for The Three Investigators, where they encounter a movie company and a ghost.

Three young detectives go on a high-stakes treasure hunt in order to restore a fortune to the rightful heirs.

The Three Investigators must solve an old man's riddle to uncover a great fortune for their friend, Gus. But they're racing against a sinister bunch of treasure hunters who are also hot on the trail. Who will arrive first at the mysterious Fiery Eye?

The Three investigators are hounded by supernatural forces as they attempt to recover a stolen sculpture of a legendary wolf-dog.

The prince of Varania must find the royal badge of office, a jeweled silver spider, in order to be crowned. There's just one problem—the silver spider has been stolen! It's up to the Three Investigators to find the spider and save the prince from his deadly political enemies!

The Three Investigators, aided by their friend Allie, try to untangle the unusual circumstances surrounding an abandoned mine.

The alarm clock went off with the bloodcurdling scream of a woman in mortal terror! Who could have made such a clock—and why? The Three Investigators immediately set out to discover where the mysterious clock came from. When they come across a run-down house in Hollywood, they find an entire room full of dreadful clocks—and time is running out!

When three junior detectives search for a valuable old Spanish sword lost since the Mexican War, the headless statue of a horse yields a clue.

Three young detectives search for a stolen statue only to find that it has mysteriously come to life.

The Three Investigators foil a plot to kidnap the son of a political leader in an African colony.

Is former movie star Madeline Bainbridge an innocent victim—or a target of revenge? Thieves have just stolen her valuable old films. And her memoirs have mysteriously disappeared before they could be published. Why would anyone want the aging actress to suffer? When The Three Investigators look into her hidden past, they begin to understand. The lady is a witch—and her spells can kill.

The theft of some mutant army ants by a scarecrow leads the Three Investigators to the solution of two daring crimes in the art world.

Three young sleuths uncover a mystery buried since World War II when they come to the aid of a trouble-plagued environmentalist who is protesting the drilling of off-shore oil wells.

The young sleuths track down a vandal who has been smashing car windows all over town, and discover a much more serious crime disguised by the first

A cross-country car trip with Pete's grandfather, an eccentric inventor, becomes a menacing chase as the detectives find themselves involved in a mysterious case

Searching for a legendary pirate treasure, the Three Investigators find a band of modern day pirates.

Bob wundert sich über eine befremdliche Begegnung mit einem "Blinden" - oder ist es etwa ein "Blender", dieses Narbengesicht? Und schon haben die drei ??? wieder eine ganze Menge Puzzleteile zusammenzusetzen. Richtig gefährlich scheint die Sache aber zu werden, als plötzlich "Wanzen" auftauchen und von illegalem Handel die Rede ist, als das "Motel Seeblick" mitsamt dem Berg ins Rutschen kommt und die "Maria II" ihre letzte Fahrt antritt, die so dramatisch enden wird...

The disappearance of some recently discovered fossils and the sighting of a living cave man present Jupiter, Pete and Bob with a perplexing puzzle

Jupiter, Bob, and Pete dig and flood a small trench on the beach in order to save a stranded baby whale, but when they return the whale has vanished without a trace.

The crime-fighting trio of Jupe, Pete, and Bob sets out to prove that wealthy eccentric Charles Barron, who is convinced that aliens are planning to come for him, is the target of fraud. Original.

Something is fishy in Mermaid Court! First a little boy mysteriously vanishes, then a treasured statue of a mermaid disappears. An actor tells outrageous lies...a dog lover gets an unexplained bite...and lights flicker in the windows of the haunted Mermaid Inn! The Three Investigators are eager to find the lost child, but the other mysteries keep getting in the way. The super sleuths face one dangerous puzzle after another before discovering the amazing truth about the missing boy!

When an ornery book collector disappears, the Three Investigators break into his secret computer files in search of clues and gradually uncover his mysterious past.

A pigeon with a missing toe leads three young sleuths to a group of ingenious thieves.