From what I have read he will keep the author's indentities a secret. But just like you have stated Tim_Axe who knows.

From reading the article it seems that he will be doing his best to make sure that the stories are valid.
Mitnick and a co-author will analyze the attacks and offer readers suggestions on how to avoid such attacks on their own networks, he said.
But of course he himself also says:
The biggest challenge will be verifying the truth of the stories, Mitnick said
Reading the article I also noticed that he is restricted about telling stories about his own hacks until 2010. He must have done some serious hacks to warrant that.