3 books · Ages 8–12 · Chapter Books
Spy on History is a 3-book series for ages 8–12 by Enigma Alberti. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, Mary Bowser and the Civil War Spy Ring and Anna Strong and the Revolutionary War Culper Spy Ring are great first picks.
No particular order needed — browse and pick what catches your eye.