On last night’s Hardball, Chris Matthews insinuated that Scott McClellan’s publisher, Peter Osnos, wrote the book:

MITCHELL: Those who did say that the analysis, the depth of the analysis, the writing of this book perhaps reflects some very good editing and some other information… MATTHEWS: So Peter Osnos (ph) wrote it?MITCHELL: I wouldn‘t—I have no way of…(LAUGHTER)MITCHELL: … saying that.MATTHEWS: I‘ll tell you…(CROSSTALK) MITCHELL: I‘m just saying…MATTHEWS: … it‘s written like a very sophisticated writer, for, like, “The New York Times” or someone like that. It reads extremely well.

Newsbusters has more commentary on Osnos.