Henry Allen's dog is missing - and he thinks it's been eaten by a dragon! On the night the dog disappeared, Mr. Allen swears he saw a huge dragon slither into the sea caves beneath his cliff-top house…
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.
In Rough Stuff, the Investigators' small private plane crashes in the mountains, far from civilization. When the pilot (and father of one of the Three Investigators) mysteriously disappears, the teens…
