L'exorciste 3 (la suite)

A detective is faced with a series of baffling murders, where the clues seem to point to the psychiatric section of a local hospital, He spends a lot of time thinking about the origin of evil and theodicy.

It’s not the most thrilling or frightening, but an endearing lead character, rich philosophy, and Blatty’s addictive writing make this a page-turner, nevertheless.