The Ismailis are a geographically, linguistically and ethnically diverse Shi'a Muslim community - the second largest in the world. Scattered in more than twenty countries of Asia, Africa, Europe and North America, they are currently led by their 49th Imam, His Highness the Aga Khan. In four chapters, this book traces their history within the wider context of Islamic history and the world in general, over the better part of 1400 years. Each chapter is fully illustrated and accompanied by relevant maps and diagrams such as genealogical charts. The book has more than 300 illustrations, most in colour, consisting of images from illustrated manuscripts, artefacts, architecture, community documents, as well as important historical and contemporary photographs of members of the Ismaili community (many from private collections and archives) and the varied geographical contexts in which they live. A chronology of key events, a glossary of important terms, and a bibliography are also provided.