Martin Custers of Maastricht has recently published a monumental 3-volume bibliography of the Ibadiyah: Custers, M.H. _Al-Ibadiyya: a bibliography_. Maastricht: [the author,] 2006. 3 vols. xii, 432; 371; 348 pp. Paperbacks. Vol.1: _Ibadis of the Mashriq_. ISBNs 90-5291-092-8 & 978-90-5291-092-5 Vol.2: _Ibadis of the Maghrib (incl. Egypt)_. ISBNs 90-5291-093-6 & 978-90-5291-093-2 Vol.3: _Secondary literature_. ISBNs 90-5291-094-4 & 978-90-5291-094-9 Enquiries to the author at [log in to unmask] This exhaustive annotated bibliography covers both manuscripts and printed materials, in Arabic and European languages. Geoffrey Roper London