Before watching the movie:
A Study in Scarlet is, as the first Holmes story, important, but is also very unlike most other stories, in that half the book completely departs from Watson’s narrative and instead lays down motive. From another point of view, Holmes’s investigation sets up a half-novel romance on the American frontier. I’m interested in seeing how adaptations handle this oddity, though in most cases they handle it by ignoring the second part. On the one hand, it doesn’t have Holmes in it, which is the draw, but on the other, it’s the more cinematic part of the story. I have a sneaking suspicion this movie will dip into it more than most.