Ninja Books in Order

The Ninja books are Benedict Jacka's earlier younger-reader adventure series, and they open with a very direct problem: two siblings need to run. Ignis and Allandra Havelock are trying to escape their father, Vargas, a violent drug baron who expects his children to follow him into the family business. What begins as a desperate getaway during a trip to Wales quickly turns into something far stranger.

After the escape goes wrong, Ignis and Allandra are rescued and taken to Rokkaku, a secret ninja school hidden in a forest valley. That is the big hook of the series. Instead of ordinary classrooms, the children of Rokkaku learn stealth, discipline, movement, and survival, and the books mix that training with a strong sense of refuge and found family.

Rokkaku is the heart of the series.

The Welsh setting matters because it gives the story a tucked-away, almost storybook sense of safety. Deep woods, hidden paths, and buildings set high among the trees make Rokkaku feel cut off from the world Vargas controls. But that safety is never complete. The point is not just that the children get to learn cool skills, it is that those skills matter because their old lives can still catch up with them.

Ignis and Allandra do not stay isolated for long, and part of the appeal is watching them build new friendships while adjusting to the rules and hierarchies of the school. Training is hard, loyalties are tested, and even inside Rokkaku there are secrets to sort out. Jacka also keeps the family story messy in a good way, especially through Michael, the siblings' brother, who remains tied to the life they tried to leave behind.

By The Battle, the scope opens up. Ignis and Allandra have been at Rokkaku for two years, they are sent back into London on a mission, and Michael's return raises real doubts about where his loyalties lie. The stakes stop being just about escape and become about protecting the school itself, along with the people who now feel like home.

These are fast-moving books with martial arts, chases, secret bases, and a lot of tension around family, trust, and belonging. It is a short two-book series, but it still gives you a full arc, especially around Vargas, while leaving the world feeling a little larger than what fits on the page.