Right away I'll mention that I think this would be a great project for Guillermo del Toro, who has wanted to film Lovecraft's In the Mountains of Madness for years. Here, he'll get a chance to combine his love of Lovecraft with the more claustrophobic atmosphere of Crimson Peak.
Jerusalem's Lot is set in the 19th century, at a massive mansion called Chapelwaite that sits above a town called Preacher's Corners. It is an epistolary tale collected of letters written mostly by our protagonist, Charles Boone, as he moves into the house and realizes it has a dark history and that the locals fear it. He also does some digging and realizes that his grand-uncle went insane and joined a cult in the nearby town of Jerusalem's Lot, which at present is entirely abandoned.
Boone and his manservant, Calvin McCann, do some investigating and...well, for the sake of avoiding spoilers I'll stop there. Things don't end well, naturally, and if you know at all what the term "Lovecraftian" means, you already have an idea of what sort of things happen.
I decided right away that a film version cannot be called "Jerusalem's Lot" because it's confusing to the non-reading film-goer. They'd either think it's the same movie, or think it's a sequel. It is, in fact, almost entirely unrelated, with the exception of being set more or less in the same area in Maine. But what to call it? Preacher's Corners, the name of the town most of the action is set in? I didn't like that idea. I decided the best bet was to call it Chapelwaite and market it as a highbrow, thinking man's horror film.
Casting it will be simple; the cast is relatively small. I figured del Toro's latest leading-man-du-jour, Charlie Hunnam, would work quite well as our protagnist, Charles Boone. Yes, in the novel, Boone suggests that he won't see forty again, but this isn't really a central factor to his character, plus, he's unmarried and at the time, a man over forty and still a bachelor would cause quite a few raised eyebrows in his community. It's possible that Boone actually is a closeted gay man, and in fact his closeness with the also unmarried Calvin might carry some connotations that King does not elaborate on because Charles would never include such things in his letters to friends. I'm not going to delve too deeply there, but ultimately I see nothing wrong with a man in his late 30's playing Charles Boone, especially considering he'll likely be much older by the time anyone decides this needs filming.
Robert Boone and his brother Philip are residents of Chapelwaite and Robert begins to realize that his brother is falling under the sway of a local cult leader who more or less owns the town of Jerusalem's Lot, and might in fact, be their relative. James Boon (no "e"), brought to mind a Victorian Fred Phelps, his cult (and town), made up almost entirely of his own offspring, much of whom are inbred and nightmarish in appearance. Robert is disgusted by this but Philip is enthralled, and starts seeking a book called De Vermis Mysteriis and if you know your Cthulhu Mythos, you'll know that this was a book originally invented by author Robert Bloch for his short story The Shambler from the Stars, but incorporated into the Mythos by Lovecraft himself, first in The Haunter in the Dark. So you know the book ain't good.
I thought Michael Stuhlbarg would make a good Robert and James Frain, he of the freaking crazy eyes, would make a good Philip.
So I bid a fond "see ya later" to my readers, and promise more posts are coming.