This volume collects all the publications of Nicholas Sims-Williams, which include editions of Manichaean texts in Middle Iranian languages (Middle Persian, Parthian, Sogdian and Bactrian) or studies of their vocabulary and grammar, including important articles first published in Festschriften and other hard-to-find volumes. The author has revised all the articles and updated them as needed with additional notes in square brackets, leaving the text as it was in the original publications. Wherever possible, the author has added colour photographs of the texts edited. The work is enriched by selective indexes of Middle Iranian and Turkish texts from Turfan and Dunhuang published or discussed in the articles, of words discussed, Manichaean divine beings, concepts, technical terms, names of persons, place names, scripts, languages, etc. The book will be an important tool for students and scholars interested in Manichaeism, Iranian languages, and the history, religions and literatures of Central Asia.