Michael Oren served as the Israeli ambassador to the United States from 2009 to 2013. An American by birth and a historian by training, Oren arrived at his diplomatic post just as Benjamin Netanyahu, Barack Obama, and Hillary Clinton assumed office. During Oren's tenure in office, Israel and America grappled with the Palestinian peace process, the Arab Spring, and existential threats to Israel posed by international terrorism and the Iranian nuclear program. Forged in the Truman administration, America's alliance with Israel was subjected to enormous strains, and its future was questioned by commentators in both countries. On more than one occasion, the friendship's very fabric seemed close to unraveling. Ally is the story of that enduring alliance -- and of its divides -- written from the perspective of a man who treasures his American identity while proudly serving the Jewish State he has come to call home. No one could have been better suited to strengthen bridges between the United States and Israel than Michael Oren -- a man equally at home jumping out of a plane as an Israeli paratrooper and discussing Middle East history on TV's Sunday morning political shows. Oren interweaves the story of his personal journey with behind-the-scenes accounts of fateful meetings between President Obama and Prime Minister Netanyahu, high-stakes summits with the Palestinian leader Mahmoud Abbas, and diplomatic crises that intensified the controversy surrounding the world's most contested strip of land.