Laura Bray
Laura Bray asked Erik Larson:

I love the narrative non-fiction format, and you're the best. I always wonder....about how long does it take you to research a book? And when do you know, "OK, this is enough"? Thanks!

Erik Larson The research continues pretty much through the whole process, though the most crucial and intense phase lasts about two years, minimum. As to how I know when I'm done with the research: By now it's an instinctive thing. Documents start to repeat themselves. Revelations begin tapering off. But one thing is crucial: I need to accumulate about 100 percent more material than will ever actually make it into a book. Only the best stuff makes the cut.

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