The author of ""Cyber-psychopathy: What Goes On in a Hacker's Head"" claims that the act of hacking is a deep-seated psychological illness. What textual evidence supports this statement?

Based on the information provided within the question it can be said that the text that supports this is that in the book it states that this disorder is due to an obvious "addiction" to the sheer thrill of hacking, born of having found ways around the supposed ingenuity of "invulnerable" cyber security defences.