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Bell's three rules for writing about magic.

I once read a writer's analysis of Stephen King's vampire novel. (I don't remember the title, not being much of a horror person.) But the writer pointed out that the way King forced his readers to suspend their own disbelief was by having every character in the novel ignore the clues, refusing even to consider the ridiculous possibility of a supernatural explanation, until the reader was sitting on the edge of his chair shouting, You fools! There are vampires in this town!

The novel is Salem's Lot, which I read too long ago to remember in detail. But I'll keep this part in mind.