Addiction 101 -- The psychology and neuroscience of reward -- How addiction hijacks the brain -- Genetics : born to be an addict? -- Your brain on drugs -- Why we crave coffee and cigarettes -- Alcohol : social lubricant or drug of abuse? -- The science of marijuana -- Stimulants : from cocaine to ritalin -- The science of poppies, pleasure, and pain -- The gambler's brain -- Junk food, porn, video games : addictions?