"Whither Turkey?" is a question that has become one of the most pressing national security topics of our time. The available evidence - including notably the increasingly overt ambition of Recep Tayyip Erdogan to become the Caliph of a neo-Ottoman empire, his naked hostility toward the United States and the damage being done by Turkey to America's vital interests and those of the rest of NATO and other allies like Israel and the Kurds - suggests the answer is alarming. That evidence is thoughtfully assessed in Ally No More, including in essays about the presence of Turkish influence operations and infrastructure that could bring here the threat posed to this country by Erdogan, as well, making it required reading for policy-makers and the public, alike.