The Trap Door (Infinity Ring, Book 3)

From the publishers of Spirit Animals and The 39 Clues and the mind of James Dashner, #1 "New York Times" bestselling author of "The Maze Runner."
Action, humor, and real history collide in the Infinity Ring series
Dak, Sera, and Riq are three time travelers on a mission to save history, bu [...]
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From the publishers of Spirit Animals and The 39 Clues and the mind of James Dashner, #1 "New York Times" bestselling author of "The Maze Runner."
Action, humor, and real history collide in the Infinity Ring series
Dak, Sera, and Riq are three time travelers on a mission to save history, but they're totally unprepared for the year 1850. With the United States on the verge of civil war, runaway slaves in the South look to the Underground Railroad for help escaping to freedom. But there's a traitor in their midst. Now Dak and Sera are left wondering whom to trust, while Riq risks everything to save the life of a young boy.
BONUS Join the adventure -- and experience key moments in history -- in the epic online Infinity Ring game. Each book in the series unlocks a whole new quest.
scholastic.com/infinityring