Die drei Fragezeichen Original Series by Robert Arthur, William Arden, Nick West, M.V. Carey

Finding a genuine haunted house for a movie set sounds like fun -- and a great way to generate publicity for the Three Investigators' new detective agency. But when the boys arrive for an overnight visit at Terror Castle -- home of a deceased horror-movie actor -- they soon find out how the place got its name!

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!"... moreWhen 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. less

The high pitched scream produced by an alarm clock sets three boys on the complicated and dangerous trail of art thieves.

It all started with a dollar. One dollar paid at auction by Jupiter Jones for a dusty old trunk that once belonged to The Great Gulliver, a magician who vanished as mysteriously as one of his tricks. The trunk attracts a host of bizarre characters, like Zelda the Gypsy, Three-Finger Munger, and Maximilian the Mystic. But what's inside the trunk is even more bizarre -- a skull that talks!

Hot on the trail of seven talking parrots that have seemingly vanished into thin air, the Three Investigators are in more trouble than ever. Danger lurks at every turn as they search for the birds, each of whom can quote part of a coded message from a mysterious dead man.

When five dogs disappear from a seaside town and a dragon is sighted off-shore, the three investigators look into the situation.

The Three Investigators solve a case involving an international gang of art forgers.

Three junior detectives investigate a mystery involving an Oriental chest, a sunken ship, and a baffling dual identity.

The Three Investigators search for a stolen statue only to find that it has mysterously come to life.

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.

Searching for a legendary pirate treasure, the three investigators find a band of modern day pirates.

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!