In the predawn hours of July 10, 2014, the son of Alaskan scientist and National Geographic Explorer Roman Dial walked alone into Corcovado National Park, an untracked rainforest along Costa Rica's remote Pacific Coast. He carried a light backpack and machete. Cody emailed his father that he would do 4 days in the jungle and a day to walk out. He was never seen again. The authorities suspected murder. Dial was forced to confront the question: Was he responsible for his son's fate? -- adapted from jacket.

Family -- Usibelli -- 10,910 -- Peggy Mayne -- The cornice -- Cody Roman Dial -- Tropics of Cancer and Capricorn -- Umnak -- Space captain -- Borneo -- Gunung Palung -- Jungles and ice -- Dungeons and dragons -- Big banana -- Mexico -- Guatemala -- El Petén -- Finding Carmelita -- South to Costa Rica -- "The best map yet" -- "email, please!" -- Dondee -- The corners -- Carate -- The helicopter -- Rio Conte -- Jenkins -- Zeledón -- Cruz Roja -- Whiteout -- Las Quebraditas -- Negritos -- Piedras Blancas -- Homefront -- The fellowship -- Tree fall -- Foul play -- Peggy and Jazz -- Cerro de Oro -- Roman's route -- Rio Claro -- Back to Alaska -- TIJAT -- Carson -- Kool-Aid -- Pata Lora -- A backpack -- Discovery -- Sleeping in the forest -- Closure -- Gather the ashes -- Meat, ravens, and seeds.