Book excerpt: This book explores the life of el-Hajj Beshir Agha (ca. 1657-1746), the most powerful Chief Harem Eunuch in the history of the Ottoman Empire Enslaved in his native Ethiopia as a boy, then castrated in Egypt, el-Hajj Beshir became one of hundreds of East African eunuchs who inhabited the imperial palace’s enormous harem. Rising through the ranks to become harem treasurer by 1707, he eventually oversaw the educations of crown princes and harem women whilst choosing and deposing a long series of grand viziers. Wielding unparallelled power and influence over the empire, the libraries that he founded throughout the region helped to shape the religious and intellectual profile of the Ottoman state.