Janitors Books in Order

Janitors starts with a terrific middle grade question: what if the people who clean the school are the only ones keeping it safe? Spencer Zumbro notices strange creatures lurking around Welcher Elementary, and when he sees a janitor battling one with a vacuum, he realizes he is not imagining things. With Daisy's help, he gets pulled into a hidden world that has been operating right under students' noses.

The setup is part school fantasy, part secret war. In these books, janitors use enchanted cleaning tools and hidden knowledge to battle Toxites, creatures that feed on the brain waves of kids. A substance called Glop powers much of the strange magic in the series. That means classrooms, hallways, supply closets, and cafeterias stop being ordinary spaces. They become battlegrounds, meeting points, and places where loyalty can shift fast.

That school setting really matters.

Whitesides keeps widening the story as the series goes on. Secrets of New Forest Academy pushes Spencer, Daisy, and their allies into a larger conflict with the Bureau of Educational Maintenance, an organization that should be protecting schools but clearly has its own agenda. Curse of the Broomstaff digs deeper into the source of the magic itself, with clues leading toward the Aurans and a secret landfill. By Strike of the Sweepers and Heroes of the Dustbin, the books have grown into a full rebellion story, complete with mutated Toxites, the Founding Witches, and the future of education hanging in the balance.

Even as the stakes get bigger, the series stays rooted in kid logic and kid courage. Spencer, Daisy, Dez, Alan, and the rest of the team are not distant fantasy heroes. They are funny, stubborn, scared, brave kids who keep getting dragged into harder problems and deciding to face them anyway. That helps the books stay accessible. The magic is inventive, but the real engine is trust, teamwork, and figuring out who is actually on your side when every adult organization looks suspicious.

It is also cheerfully a little gross.

Mops fly. Squeegees open portals. Vacuums become weapons. One of the pleasures of the series is seeing boring custodial gear turn heroic, or terrifying. If you like fast plots, secret societies, and fantasy that transforms everyday school life into something weird and high stakes, this is the lane Janitors owns. It is best read in order, starting with Janitors, because each book builds on the friendships, the hidden history, and the escalating war.