'Spiral: From the Book of Saw' is what horror spinoffs were made for

Going into Spiral: From the Book of Saw, I was thinking about the kills. But leaving the theater (yes, [INS: an actual theater :INS]!), blood and guts were the least of my concerns. There was just too much else to be excited about — too much else to haunt my nightmares and post-screening conversations.

Based on a story by...