Book excerpt: Islamic Post-Traditionalism in Indonesia offers a unique assessment of the development of the phenomenon of Islamic post-traditionalism using Nahdlatul Ulama (NU), the largest mass Islamic organization in Indonesia (and the world) as a case study. Post-traditionalism is a term now widely used to describe the often controversial attempts by progressive reformers to reify and legitimize modern intellectual notions, often from non-Islamic sources, by using reference to terminology and ideas drawn from Islamic tradition. This book discusses the discourse of post-traditionalist thought within Islamic thought more widely, before turning to examine the emergence of new currents of progressive thought within NU in Indonesia and the factors that influence that. In particular, the book explores the sometimes fiery struggle between liberal and conservative thought in NU; and the position of post-traditionalist thought in the wider development of intellectualism in Indonesia. It covers in detail new religious discourses that are being developed and offers important insights into the implications and future for post- traditionalist thought among Muslims. The highly influential Indonesian version of this book was originally published as Post Traditionalisme Islam: Wacana Intelektualisme dalam Komunitas NU by the Fahmina Institute, Indonesia, 2008.