Kip, Albert, Leela and Timmi are back, and the riddles are trickier than ever. A fresh trail of puzzles leads to a lost craft called The Salamander and onwards to new wonders. With guardian android Incognita they take off for the beautiful but deadly Molten Ocean, where unlikely allies emerge from the depths. The race is on to find the Futurescope’s eyepiece and shut down the Grittleshank’s smoulderstone mine before the world as we know it is torn apart.

But when Kip learns his mother is being held hostage, everything changes. To stop the disaster, he’ll need to take friendships to their limits, outwit bloodthirsty enemies, and make a choice no child should ever have to face. Will he risk the world to save his family?

Brimming with wild inventions, dazzling twists and plenty of sideways thinking, this is a must for puzzle-solvers, adventurers and anyone who loves an edge-of-your-seat quest.