The 549-page book, “At the Center of the Storm,” is to be published by HarperCollins on Monday. By turns accusatory, defensive, and modestly self-critical, it is the first detailed account by a member of the president’s inner circle of the Sept. 11, 2001, terrorist attacks, the decision to invade Iraq and the failure to find the unconventional weapons that were a major justification for the war.

“There was never a serious debate that I know of within the administration about the imminence of the Iraqi threat,” Tenet writes in a devastating judgment that is likely to be debated for many years. Nor, he adds, “was there ever a significant discussion” about the possibility of containing Iraq without an invasion.