What book is this from tommy nockers tommy nockers nocking at my door?

It's from the book (and film) 'The Tommyknockers' by Stephen King - a well-known Horror writer. It's one of my favourites ! The book takes it's name from an old rhyme...

Late last night and the night before,

Tommyknockers, Tommyknockers, knocking at the door.

I want to go out, don't know if I can,

'Cause I'm so afraid of the Tommyknocker man.

See related link for the Wikipedia entry on the novel.