(A little late night fun at C&L)
Oh yea, it's us! He's not happy because Kate O'Berine's book tanked so quickly. The word I'm hearing is that many at the NRO aren't pleased either. Let's take a look at his book, " Men in Black," reviewed by Dahlia Lithwick so we can gauge his own incredible writing skills.
Slate:

"I use the word "book" with some hesitation: Certainly it possesses chapters and words and other book-like accoutrements. But Men in Black is 208 large-print pages of mostly block quotes (from court decisions or other legal thinkers) padded with a foreword by the eminent legal scholar Rush Limbaugh, and a blurry 10-page "Appendix" of internal memos to and from congressional Democrats—stolen during Memogate. The reason it may take you only slightly longer to read Men in Black than it took Levin to write it is that you'll experience an overwhelming urge to shower between chapters....read on"

It gets worse from there. Here's a very detailed Amazon review also. Nice job Mark, don't let honesty get in your way-although that seems to be a detail many conservative book writers share.

(Update) Yep, the Corner is unraveling as we speak.