Secrets of the seven : the Eureka key /
Sam (a puzzle master) and Martina (a history whiz) become involved in a dangerous quest to find seven keys left behind by Benjamin Franklin and a secret society of descendants, which, when gathered together, unlock a powerful weapon, so the middle schoolers must solve the puzzles, find the artifacts...
|Main Author:||Thomson, Sarah L.|
New York :
227 pages ; 22 cm