The Dragon Murder Case
From a novel by S.S. Van Dine
A man dives into a pool in full view of his companions. He does not surface. The pool is drained, turning up nothing but what appear to be dragon tracks. Enter Philo Vance, a somber district attorney, and a wisecracking police sergeant, who convene to determine exactly what transpired.
This one's good fun all around, in spite of the somewhat farfetched nature of the crime. But then where would the golden age of detection have been without murderers who went to such ridiculous lengths to carry out such complicated crimes?
This actually marked my first exposure to Philo Vance. I had been meaning to read some of the books prior to seeing it, but those plans fell afoul of the "so many books, so little time" dictum.