Night before last, word started trickling out (led by Politico) about former White House Press Secretary Scott McClellan’s new Bush administration–bashing book due out next week. Since then, the new darling of the Left (Nancy Pelosi agrees with him; he’s on Keith Olbermann’s show tonight; Rep. Robert Wexler wants him to testify under oath before the House Judiciary Committee; Hillary and Obama are aligning themselves with him) has many of his former colleagues wondering what’s happened to him since he left the White House:

Karl Rove on Fox News Tuesday night: “First of all, this doesn’t sound like Scott. It really doesn’t. Not the Scott McClellan I’ve known for a long time. Second of all, it sounds like somebody else. It sounds like a left-wing blogger”

One of McClellan’s successors as press secretary and his former deputy, Dana Perino: “Scott, we now know, is disgruntled about his experience at the White House. For those of us who fully supported him, before, during and after he was press secretary, we are puzzled. It is sad. This is not the Scott we knew.”

His predecessor, Ari Fleischer: “That’s one of the reasons this book comes as such a shock. It comes from the last person that anyone would have thought would have said these things or written these things. … All you can do is scratch your head when you see how far he’s turned.”

Former presidential counselor Dan Bartlett, who followed an interview with McClellan on “Today” this morning: “He never communicated to us that he had these personal misgivings. There’s not a lot of specific evidence about the most explosive charges.”

So just what is going on with McClellan? Is he just a disgruntled former employee out to make a quick buck? There’s no doubt that all the talk fueling the controversy this week will translate into book sales next week. The book is already No. 1 at Amazon.com, and Oprah hasn’t even endorsed it as the big summer read yet!