The Eureka Key (Secrets of the Seven)

by Sarah L Thomson

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When middle school puzzle master Sam and history wiz Martina win a contest for a summer trip across the US, they discover they’ve been drafted into something vastly more extraordinary. Joining another kid on the trip, Theo, a descendant of George Washington himself, they must follow clues to find seven keys left behind by the Founding Fathers. Together the keys unlock Benjamin Franklin’s greatest invention--a secret weapon intended to defend the country. Each key is hidden in a unique location around the U.S., protected with puzzles, riddles, and traps. This has kept the weapon safe . . . until now! Gideon Arnold, a dangerous descendant of the infamous Benedict Arnold, is on the chase.

In competition with Arnold and his thugs to reach the artifacts first, Sam, Martina, Theo, and readers must use their wits to solve ingenious puzzles, escape death-by-booby-trap, and, by the end of the series, save our nation by uncovering many of its greatest secrets.
  • ISBN10 1619637316
  • ISBN13 9781619637313
  • Publish Date 14 July 2016 (first published 5 April 2016)
  • Publish Status Out of Print
  • Out of Print 12 August 2021
  • Publish Country GB
  • Publisher Bloomsbury Publishing Plc
  • Imprint Bloomsbury Childrens Books
  • Format Hardcover
  • Pages 240
  • Language English