I won’t pretend that the technology in The Guns Above was easy to imagine. I spent months working out the details and checking them against real-world analogues. A thousand cool and exciting ideas were cut down in their prime, excised by the cruel blade of reality, because I wanted tech that would pass the test of the hard-fantasy reader. I wanted an airship you could build yourself, with enough money and no more than one or two alterations to the laws of physics.

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