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Goodreads asked S.Z. Attwell:

Where did you get the idea for your most recent book?

S.Z. Attwell I was standing in the underground bus station on a horribly hot and humid late afternoon just as a thunderstorm was rolling in. It was miserable and the air was all but drenched and I was standing there, annoyed, waiting for the bus to show up, with fans blasting in the background. It occurred to me that if (God forbid) the planet were to ever reach severe climate change, this might be our reality - and that we might have to, for example, retreat underground to escape the heat...so I started thinking, what if I were waiting on my end-of-day work bus to take me DOWN into the Earth? What might happen on the way down? That became the beginning (chapter 2) of Aestus.

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