Goodreads asked Michael Hebler:

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

Michael Hebler "Legend of the Chupacabra" is book three in a series, so the inspiration behind the idea just came to me once I knew how I would end book two, "Curse of the Chupacabra." But [Legend] does have this subplot about shanghaiing and the Portland Underground. That idea came from an hour documentary I watched on a cable channel. I don't remember which one. Either the History Channel or Discovery. I think the episode was part of a series called, "Underground America," or something along that line. If you haven't seen it, you should check it out. It's fascinating!

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