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For middle grade fans of National Treasure and Indiana Jones, this smart, action-packed series continues with more enticing historical mystery and interactive puzzles. Like Alexander Hamilton, this one is non-stop!Middle school geniuses Sam, Martina, and Theo arrive in New York City on a mission. They're after the third key left behind by the Founding Fathers. They've escaped the forests of Glacier National Park with the second key, but at great cost--Evangeline, their chaperone and friend, was captured by the nefarious and dangerous Gideon Arnold. Now they have to navigate New York City following clues related to Alexander Hamilton, solve (and survive) the puzzles and traps they encounter along the way, and find the third key before Gideon Arnold does. But the stakes have never been higher, and they might not all make it out alive... Another exciting adventure filled with clues, puzzles, and action that dives into the fascinating history behind the Founding Fathers and our country's natural wonders.

Middle school geniuses Sam, Martina, and Theo head to Glacier National Park to find the second of seven artifacts--keys that unlock a secret weapon--left by the country's Founding Fathers. The clues lead them to look for Thomas Jefferson's Eagle's Quill at a Montana ranch. But dangerous Gideon Arnold, descendant of the infamous Benedict Arnold, is hot on their trail. He takes their chaperone and the ranch owners hostage until the kids deliver the quill. Can Sam, Martina, and Theo, with the help of rancher girl Abby, find Jefferson's artifact before it's too late? They enter the wilderness to solve riddles and escape traps that protect the quill... but if they find it, can they keep it away from Arnold and save everyone? In this fast-paced adventure full of action and interactive puzzles, the kids and readers must use their wits to save our nation by uncovering its greatest secrets.