Secrets of the Dragon Tomb by Patrick Samphire

You do not need to have read Secrets of the Dragon Tomb to read this novella. The Dinosaur Hunters is a novella set in the world of Secrets of the Dragon Tomb. She and Bertrand may not make it out of the wilderness alive. If Harriet cannot solve the mystery, her family won't just be ruined.

But there is far more going on in this expedition than mere robbery, and the dinosaurs are not the greatest danger. Even if that mean that she and Bertrand have to follow the thief’s intended victim, the Countess von Krakendorff, on a dinosaur hunt in the perilous Martian wilderness. So she comes up with a plan: she will capture the Glass Phantom herself. If he fails, Bertrand will lose his job and the whole family will be ruined. But now the famous jewel thief, the Glass Phantom, has come to Mars, and Bertrand has been given the job of tracking him down. As far as Harriet knows, Bertrand has never caught a criminal in his life. He’s never been much of a police inspector. Meanwhile, her brother-in-law, Bertrand, has a problem. Now her older sister is determined to marry her off. Sixteen-year-old Harriet George has never had the chance for an adventure. Mars in 1815 is a world of wonders, from the hanging ballrooms of Tharsis City to the air forests of Patagonian Mars, and from the ice caves of Noachis Terra to the Great Wall of Cyclopia, beyond which dinosaurs still roam.

Secrets of the Dragon Tomb by Patrick Samphire