I First CONCEIVED THE PROJECT of writing a book on Muslims under infidel Mongol rule in 2006. Heather McCallum at Yale University Press gave the idea a warm welcome, and I have greatly appreciated her continued enthusiasm and interest, over a considerably longer period than either of us anticipated. I am also grateful to both Heather and her colleagues Rachael Lonsdale, Melissa Bond and Samantha Cross for seeing the book through to publication, and to Richard Mason for being a thorough and efficient copy-editor.

While working on this book, I have incurred many debts. must mention the unfailing helpfulness, patience and courtesy of staff in the following institutions: Cambridge University Library, the Bodleian Library, the Library of the Oxford Centre for Islamic Studies, the British Library, the Warburg Institute Library, the Wellcome Library, the Library of the School of Oriental and African Studies, Birmingham University Library and the John Rylands University Library in Manchester. From the last three of these institutions I have been able to borrow books under the SCONUL scheme, an invaluable privilege indeed that should not be taken for granted, and it is a pleasure to acknowledge here the assistance of the scheme. I am also grateful for the assistance of staff in the Bibliotheque Nationale, Paris, and (some years ago) in the Siileymaniye Kiitiiphanesi and the Topkapi Saray1 Miizesi, Istanbul.

Peter Jackson