How many A True Book: Martial Arts books are there?

There are 2 books in the A True Book: Martial Arts series by Tim O'Shei, for ages 6-11.

A True Book: Martial Arts Books in Order — Wonderlit

A True Book: Martial Arts is a 2-book series for ages 6–11 by Tim O'Shei. Each book stands alone — start anywhere.

Start anywhere — each book stands alone.

That said, Kendo and Karate are great first picks.

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