Here's a really fun book about Roman gladiators - "Julius Zebra: Rumble with the Romans" by Gary Northfield. I just read this book. It's an easy read that tells the journey of a zebra captured by Roman soldiers in Africa and whisked away to Rome to become a gladiator. Julius becomes friends with the other caprured animals as they train for a battle for the birthday bash for King Hadrian. The pages are in Roman numerals and there's a glossary at the end of terms used related to gladiators and Latin. I got this book at the library for fun - I love reading children's books ðŸ˜ and reading them to my kids or recommending they read it. The book is a good sized chapter book with pen drawings here and there. It has a bit of Roman gladiator history, but mostly it's fun and your son won't be intimidated to read it.