Former US Secretary of State Henry Kissinger initially kept the outbreak of the Yom Kippur War a secret from then-president Richard M. Nixon, historian Robert Dallek reveals in a new study of the Nixon and Kissinger's foreign policy and personal relationship dueto be published in April. Dallek, the author of An Unfinished Life, a biography of John F. Kennedy, delved through previously untapped records of Nixon and Kissinger's partnership, including some 20,000 pages of transcripts of Kissinger's phone conversations, to compile his study Nixon and Kissinger: Partners in Power. According to Dallek, reports that Israel had been attacked reached Washington at approximately 6 am that same day, but Kissinger waited three and a half hours before informing Nixon in order to keep the president from interfering. Partners in Power (HarperCollins) examines five years of American foreign policy under Kissinger (who served as national security advisor before becoming secretary of state) and Nixon, and proffers a behind-the-scenes look at how they tackled not only the Middle East, but Vietnam, Cambodia, and China. In addition to analyzing their political decisions, Dallek analyzes the two men's characters and their often complex working relationship.