Mark Walden Books in Order

If you want the core H.I.V.E. story: H.I.V.E. → The Overlord Protocol → Escape Velocity
If H.I.V.E. hooks you and you want the bigger arc: Dreadnought → Rogue → Zero Hour → Aftershock → Deadlock → Bloodline
If you want alien invasion and survival sci-fi: Earthfall → Retribution → Redemption

Mark Walden came to children's fiction by way of the games industry, which makes a lot of sense once you read him. His books move fast, love gadgets and secret bases, and put smart kids in situations that keep getting bigger and stranger.

He studied English literature at Newcastle University, then completed a master's degree in twentieth-century literature, film, and television there as well. In interviews, he's said that school English was one of the few places where creativity was actively encouraged, and that early love of making things up never really went away.

Writing gave him something the games business no longer could, room to build a whole world on his own.

Before becoming a full-time writer, Walden spent about a decade working as a video game designer and producer. He has said that after years in that world he grew frustrated by how huge and collaborative the work had become, and how little room there was for one person to steer the whole thing. Books offered the opposite, a blank page, a single voice, and the freedom to follow an idea wherever it led.

The spark for H.I.V.E. came from a very specific question: where do supervillains learn their trade? Walden once traced the idea back to a conversation about a friend's cat, Otto, who reminded him of the white cat in the old James Bond films. From there he started thinking about classic larger-than-life villains and the fact that nobody ever explains where they came from. Out of that came Otto Malpense, a thirteen-year-old criminal prodigy sent to the Higher Institute of Villainous Education, a secret school hidden inside a volcano.

That question turned into a career.

H.I.V.E., published in 2006, was his debut, and it quickly found readers. It went on to win the 9+ category in Richard and Judy's Best Kids' Books Ever, and Walden built the story into a long-running series that includes The Overlord Protocol, Escape Velocity, Dreadnought, Deadlock, and, years later, Bloodline. Readers tend to come for the gleeful premise, but they stay for the friendships, the twists, and the way Otto keeps testing whether talent decides your future or choice does.

That tension runs through a lot of Walden's work. Even when the setup is playful, his stories keep circling back to loyalty, pressure, identity, and the awkward reality of being the smartest kid in the room when that doesn't actually make life easier. His young heroes are often trapped inside secret systems much larger than they are, then forced to work out who deserves their trust.

He carried those instincts into the Earthfall trilogy too, but in a darker key. Earthfall, Retribution, and Redemption swap the supervillain school for an alien-occupied Earth and a boy named Sam trying to stay alive in a world that has changed almost overnight. The mood is harsher and the danger more direct, but the same Walden qualities are still there: pace, tech-heavy ideas, and ordinary young people facing impossible choices.

Walden lives with his family in Hampshire. His wife Sarah and daughter Megan get affectionate mentions on his own site, and he has also joked about the family cat, Marge, treating him like the pet instead of the other way around. That sense of humor fits the books nicely. Even when the stakes are high, he never seems to forget that stories are supposed to be fun.