2 books · Ages 7–12 · Graphic Novels
Graphic Library: Science Traditions is a 2-book series for ages 7–12 by Mark Weakland. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, The Lonely Existence of Asteroids and Comets and Mummies and Sound are great first picks.
No particular order needed — browse and pick what catches your eye.