Tell me you haven't read the books without telling me you haven't read them!

Read them all. Multiple times.

Mind actually using words to form useful sentences?

He of course insisted he wasn’t an addict - like all addicts do - but he always went back that I remember - like all addicts do. And he used it to cope with not having any interesting problems and the misery of life.

He was enabled by Watson and his brother, and mostly supported in the elements of normal social functioning by them.

Where we draw the line between addict and not is quite subjective in these situations eh?