A rip-roaring, hilarious alternate-history adventure starring the world's most famous inventors—and its most forgotten. From the author of the beloved Hero's Guide series, Christopher Healy.

It's 1883—the Age of Invention! A time when great men like Thomas Edison, Alexander Graham Bell, Nicola Tesla, and George Eastman work to turn the country into a land of limitless opportunity.

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The thrilling conclusion to Christopher Healy's funny, action-packed, acclaimed alt-history adventure! It is 1884, and Molly and Cassandra Pepper, Emmett Lee, and Emmett's long-lost father are sailing back to New York following their death-defying adventure in Antarctica. Having discovered a subterranean world at the South Pole while saving the world from certain doom once again, surely their accomplishments will finally earn them the recognition...