Link dump:
Book says White House ordered forgery, By Mike Allen. Politico, August 5, 2008.

Suskind CIA Tape: 'Forge' Order Came From Cheney, Libby, By Jeff Stein. Spytalk, August 8, 2008.

Suskind Revisited, by Philip Giraldi. The American Conservative blog, August 7th, 2008. (Phil is retired CIA)
My source also notes that Dick Cheney, who was behind the forgery, hated and mistrusted the Agency and would not have used it for such a sensitive assignment. Instead, he went to Doug Feith’s Office of Special Plans and asked them to do the job.
Suskind's interview transcript with Rob Richer.

Statement from Rob Richer, August 8, 2008

Statement by former CIA director George J. Tenet regarding the publication of “The Way of the World,” by Ron Suskind.