I especially thank the many British Muslim scholars of Islam who welcomed me into their working worlds to learn more about what they do. I single out Khurram Bashir, Amra Bone, Haitham al-Haddad, Khola Hasan, Suhaib Hasan, Usama Hasan, Atif Matin, Ibrahim Mogra, Abu Sayeed, and Faiz ul-Aqtab Siddiqi for their patience and openness. Among the many other British colleagues who have contributed to my thinking on these issues are Qamar Bhatti, Robin Griffith-Jones, Stephen Hockman, Aina Khan, Maleiha Malik, Werner Menski, and Prakash Shah. Portions of chapter 10 appeared in John R. Bowen, “How Could English Courts Recognize Shariah?”, St. Thomas Law Review 7 (3): 411–35, 2011. At Princeton University Press, once again I am delighted to thank Fred Appel for his ideas and support, and for this volume I am grateful to Natalie Baan and Cathy Slovensky for their careful editorial work. At Washington University I remain grateful for the support of Georgia Dunbar Van Cleve and her late husband Bill, as well as for all the day-to- day support that all of us fortunate to work here derive from the university as a whole. I also received valuable support from the National Science Foundation (#0961272, 2010).