3 books · Ages 8–12 · Chapter Books
What Do We Know About? is a 3-book series for ages 8–12 by Ben Hubbard. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, What Do We Know About the Roswell Incident? and What Do We Know About Crop Circles? are great first picks.
No particular order needed — browse and pick what catches your eye.