"Permanent Addiction Volume Two: The One About Skulls" is Hector's third art book. This is also the second book in the Permanent Addiction series. Just like volume one, volume two is a collection of Hector's artwork from an Inktober challenge. Instead of working with just black and white, Hector took it a step further and added color to each individual illustration. Loaded with details and beautiful colors, each art piece has a small story to tell. Look close enough and you may even spot Hector himself taking on some of his greatest challenges.