This book is a thematic continuation of Gennady Prashkevich's novel The Secret Clerk. First half of the 17th century. Looking for a living mammoth in the tundra on the Indigirka. In The Secret of the Polar Prince, the famous explorer Semyon Dezhnev arranges life on the new Pogycha River. And again - little-known events, and again an incredible feeling of immersion in historical time.