The Fourth Level - Book Seven - Deep Freeze

In the aftermath of the last adventure, Charlemagne hides from the watchful eyes of the government as he travels to the North Pole in search of another meteorite with extraterrestrial qualities. However, as he searches for this meteorite, he instead unearths more than he could imagine in the ancient, cold ice of the arctic.Meanwhile, Diana and Tristan, pressed on myths and reality as well as taken aback by Charlemagne's cutting them out of yet another adventure, stowaway on the Research Vessel Ingstad unbeknownst to Charlemagne so that they can come and see the wonder of the arctic for themselves.What awaits the three, hidden and forgotten within the ice of this uninhabitable frozen land? Are some things better kept under the ice? Will Diana and Tristan see what they expect to see, or could this just be their most dangerous adventure yet...?