It means that when you read it you will be reading mostly the dialogue from the teleplay, with bits and pieces of other things, such as 'Location: Outside. Night time. In the street next to the Sherriff's car.' etc. But, it still is a good read and there are things in the screenplay that didn't make it into the final movie.I just ordered one that seems to have slipped the net when I bought all his books - Storm of the Century. It is being shipped from America though, seems hard to get on the cheap in England, I could only find it new for around £15, where as mine was £3.80 on Amazon trade. I know it was written as a screenplay, what kind of difference does that make to a book?