The Navigator Who Crossed the Ice Walls: Worlds Beyond the Antarctica by Claudio Nocelli (often associated with the Terra-Infinita series) is a speculative, fictional story following navigator William Morris. Following the American Independence War, Morris investigates the Antarctic Circle, discovering a passage through the ice walls into an open, forbidden ocean containing unknown lands, advanced ancestral civilizations, and a forgotten history of humanity. This book is described as a mixture of historical fiction, speculative fantasy, and alternate cosmology, focusing on revelations about the "true" nature of the world, often told from the perspective of a woman claiming to be from beyond the ice.