5 books · Ages 7–13 · Chapter Books
STEM Trailblazer Bios is a 5-book series for ages 7–13 by Matt Doeden. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, Dorothy Vaughan: NASA's Leading Human Computer and Ralph Baer: The Man Behind Video Games are great first picks.
No particular order needed — browse and pick what catches your eye.