I have Paul Bremer’s book about his year in Iraq, may be able to find something re Kerik in there.
What dirt do you suspect? I think Kerik went a bit astray, abused power perhaps but do not ascribe sinister motivations, nor do I believe Giuliani is implicated.
Giuliani has not disappeared from the political scene. He has been mentioned as a possible candidate for Governor of New York.
If this guy were a black Democrat from Chicago with a Muslim-sounding name, he would be Barack Hussein Obama.
P.S. Giuliani's political career is over -- count on it.