Milum, I think I understand what WW is going for. I found this explanation for the dash in a punctuation guide.

Dash (--)


Use a dash to indicate an abrupt break in thought.
Example: The truth is--and you probably know it--we can't do without you.


Use a dash to mean namely, in other words, or that is before an explanation.
Example: It was a close call--if he had been in a worse mood, I don't think I'd still be her

So the name of the book is not really an explanation so the dash doesn't apply.

Well now, see, I love learning something new everyday.