Sea Without Shore: A Manual of the Sufi Path, an extensive treatment of the science of tasawwuf. It is an expansion of an earlier work entitled Tariqa Notes (which it has replaced), which comprises the second part of the book. In addition, this work includes biographies of five accomplished Sufis that the author met, along with a series of articles in question/answer format providing answers to contemporary philosophical problems.
Al-Maqasid: Imam Nawawi's Manual of Islam, a translation of a concise manual of Shafi'i fiqh.
In addition to the above, he has produced the following books in Arabic:
Awrad al-Tariqa al-Shadhiliyya, which is primarily a collection of the most frequently recited litanies in the Shadhili Sufi order, done in a hand-written calligraphic script of which two ions have been published. It also has been produced into a bi-lingual translation entitled "Invocations of the Shadhili Order", which Nuh Keller has himself translated.
Dala'il al-Khayrat, a classic collection of prayers upon Muhammad (commonly known as durood) originally compiled by Muhammad al-Jazuli, which through the comparison of ninety-five different manuscripts, is the most authenticated copy that has been produced in the modern world. It has also been done in a hand-written calligraphy.
He has also written numerous articles and is a regular contributor to Islamica Magazine and the website masud.co.uk.