Sy Montgomery (author: Soul of an Octopus) and Warren Carlyle (founder of OctoNation) on friendly octopuses, the Mayor of Octopus City, and their top octopus secrets from their new book Secrets of the Octopus that accompanies the National Geographic TV series. Second of a two-part interview about the wild world of octopuses! "We're in the age of octopus," Sy Montgomery.