We learn that Mr. Byng was initially on Mr. Assange's side to postpone the book:

Jamie: If it moves into 2012 then so be it. I think we’ve lost a great moment and opportunity but that is by the by. What we’ve got to do is be realistic about your time and what will result in the best possible book. I think it will be a book that will have more enduring qualities if it is something different from what we’d originally conceived and if it includes these critical moments from 2011. I don’t know what the other publishers will think. But I don’t want to do anything in a hurry. I’ve accepted we’re not going to publish a book this year. Getting upset, het up, whatever, will achieve zero.

Then, in June, Mr. Assange hears a rumor:

Julian: I hear some noises about people looking to publish unauthorised copies of my manuscript.

Jamie: No. That is absolutely not what we are going to do or want to do. The position I am in, as we discussed last Friday, is the absolute best thing for us and you is that we work with Andy on a book which is a third person account.

The book came out last week.

Anyway, here's what Mr. Assange released.

Here's Canongate's response.

The book hasn't been selling very well. Here's one review.