How many First Graders from Mars books are there?

There are 3 books in the First Graders from Mars series by Shana Corey, for ages 5-9.

First Graders from Mars Books in Order

3 books · Ages 5–9 · Chapter Books, Early Readers

First Graders from Mars is a 3-book series for ages 5–9 by Shana Corey. Each book stands alone — start anywhere.

Start anywhere — each book stands alone.

That said, Tera, Star Student and Horus's Horrible Day are great first picks.

No particular order needed — browse and pick what catches your eye.