Ummm... I really don't think there is debate on this one. Perhaps someone can email him to verify, but it is almost certainly always "book". That is the phrase he uses. Whether he flubs it or rushes it, he is still always trying to say book.
...
And he does add the "and" on to the end of "book", then pause before starting with "send him to the line", so it really does sound like a two syllable word.