This great question of Pearl Harbor -- what did we know and when did we know it? -- has been argued for years. At first, a panel created by FDR concluded that we had no advance warning and should blame only the local commanders for lack of preparedness. More recently, historians such as John Toland and Edward Beach have concluded that some intelligence was intercepted. Finally, just months ago, the Senate voted to exonerate Hawaii commanders Admiral Kimmel and Lieutenant General Short, after the Pentagon officially declared that blame should be "broadly shared." But no investigator has ever been able to prove that fore-knowledge of the attack existed at the highest levels.

Until now. After decades of Freedom of Information Act requests, Robert B. Stinnett has gathered the long-hidden evidence that shatters every shibboleth of Pearl Harbor. It shows that not only was the attack expected, it was deliberately provoked through an eight-step program devised by the Navy. Whereas previous investigators have claimed that our government did not crack Japan's military codes before December 7, 1941, Stinnett offers cable after cable of decryptions. He proves that a Japanese spy on the island transmitted information -- including a map of bombing targets -- beginning on August 21, and that government intelligence knew all about it. He reveals that Admiral Kimmel was prevented from conducting a routine training exercise at the eleventh hour that would have uncovered the location of...