A secret atlas - Michael A. Stackpole

In Nalenyr, the family of the Royal Cartographer stands in a unique position. They not only draw the maps, but also explore uncharted territories, expanding and updating the existing knowledge of the world. Their talent has yielded them enormous power and wealth–and it can also cost them their lives.

Now the Royal Cartographer’s two grandsons, Keles and Jorim, have been sent on a dangerous mission to explore the darkest corner of the unknown. As one charts the seas, looking for new lands, the other braves a region torn apart by ancient magics. Meanwhile, back home, their sister, Nirati, tries to protect her brothers from the intrigues, passions, and jealousies that constantly endanger their family. But what Keles and Jorim discover this time is bigger and more terrifying than any new land or sea. It will threaten the fragile peace maintained since the near-apocalyptic Cataclysm years earlier. And provoke a murderous act against the Cartographers that will set off a chain of events shaking the world–both discovered and undiscovered–to its core.…