Slightly OT but what about editors give a blow by blow account of a book not yet published that is based on an Advance Readers Copy. There is absolutely nothing in policy or guidlines about ADC, and I ended up deleting the text on WP:OR grounds because it isn't published. The same article was ticketed later that day for just summarising the book. The Summary was the worst written thing I have ever seen and must have been 25kb long!
It's unverifiable, so I guess it should just be removed. I don't know anything about advance copies - do you not have to sign an NDA or anything first? (I bet you do for Harry Potter!)