Erik Larson

Room 40 knew a U-boat was heading south to Liverpool - knew the boat's history; knew that it was now somewhere in the North Atlantic under orders to sink troop transports and any other British vessel it encountered; and knew as well that the submarine was armed with enough shells and torpedoes to sink a dozen ships.

For 'Thunderstruck', I discarded about a dozen ideas. And then one afternoon, I was thinking about wireless. I don't know why. I guess because it's become so ubiquitous. I was thinking that maybe there's something I could do about the origin of wireless, so I did what any self-respecting person does these days: I Googled 'wireless.'

I don't really have a bucket list, but if I did, one entry would be to dust off my college Russian and spend a big chunk of a year reading, or trying to read, 'War and Peace' as it was meant to be read, in Russian, with all that rumbly rocks-on-rocks poetry inherent to the language.

I think, one day, I might actually try writing a bunch of - a collection of essays maybe on the funnier side of the spectrum. I don't know. But it's fun to have, frankly, Twitter as kind of an outlet. When you're writing about dark things all day, it's kind of fun to have fun.

Isaac Cline was a creature of his times. He embodied the hubris of his times and, in many ways, was a victim of the storm, not just in material ways - loss of a family member and damage to the town - but also in metaphoric terms.

The telephone call that forever changed the lives of the Dodd family of Chicago came at noon on Thursday, June 8, 1933, as William E. Dodd sat at his desk at the University of Chicago.

I do think hubris played a role here as well, the belief that the Lusitania was too big and too fast to ever be caught by any submarine, and that, in any case, no U-boat commander would think to attack the ship because to do so would violate the long-held rules governing naval warfare against merchant shipping.

After I finish writing a chapter, I'll print it out, cut it up into paragraphs, and cut away any transition sentences. Then I shuffle all the paragraphs and lay them out as they come. As I arrange and hold them next to each other, very quickly a natural structure for the chapter presents itself.

My secret weapon is my wife. She's the best judge. She's a scientist and a natural reader. We've developed a detailed code for how she marks a manuscript, and I think it's what saves me from wild digressions.

The toilet from time to time imparted to the boat the scent of a cholera hospital and could be flushed only when the U-boat was on the surface or at shallow depths, lest the undersea pressure blow material back into the vessel.

The most painstaking phase comes when the manuscript is set in 'type' for the first time and the first proofs of the book are printed. These initial copies are called first-pass proofs or galleys.

The thing I always tell my writing students - I'm not a full-time instructor, by any means, but periodically I've taught writing students - what I always tell them is that the most important thing in narrative nonfiction is that you not only have to have all the research; you have to have about 100% more than you need.