Translated into English for the first time, this is a fascinating history of intelligence practices and their impact on great power rivalries in the early modern era In the sixteenth century, an intense rivalry between the Ottoman Empire and the Spanish Habsburg Empire and its allies spurred the creation of early modern intelligence. Translated into English for the first time, Emrah Safa Gürkan's Spies for the Sultan reconstructs this history of Ottoman espionage, sabotage, and bribery practices in the Mediterranean world. Then as now, collecting political, naval, military, and economic information was essential to staying one step ahead of your rivals. Porous and shifting borders, the ability to assume multiple identities, and variable allegiances made conditions in this era ripe for espionage around the Mediterranean. The Ottomans used networks of merchants, corsairs, soldiers, and other travelers to move among their enemies and report intelligence from points far and wide. The Ottoman sultans invested in the novel technologies of cryptography and stenography. Ottoman intelligence operatives not only collected information but also used disinformation, bribery, and sabotage to subvert their enemies. This history of early modern intelligence is based on extraordinary archival research in Turkey, Spain, Italy, Austria, and Croatia, and it provides important insights into the origins of modern intelligence.