Interesting link. I found the OP's lack of comment interesting, as was the organization's need to defend against a novel. If the insults are baseless then legal action might be more appropriate, certainly less attractive.
"Marc Carroggio, who oversees Opus Dei's relationship with international journalists in Rome, said he was satisfied with the book just published by John Allen. "Opus Dei: An Objective Look Behind the Myths and Reality of the Most Controversial Force in the Catholic Church" has been published so far in English, Portuguese and Korean."
Why Korean? Are there that many Opus Dei-er's in Korea? I would have thought Spanish would have been on top of the list. Thank God for Opus Dei, they are producing some excellent priests and bishops.