This volume contains descriptions of 167 titles (339 volumes) of Ismaili literature. It is thus the largest single collection of Ismaili literature in the West available to researchers.

The catalogue is arranged alphabetically by title, given in a transliterated form, with a number of indexes (some in the vernacular) in order to facilitate its use and allow for different approaches to it. The entries include beginnings (incipits) of manuscripts in the Arabic script. This feature constitutes a valuable addition to the information contained in the Ismaili bibliographies of W. Ivanow and I.K. Poonawala.

Two other notable features of this catalogue are an introduction, which deals with the codicological and palaeographical aspects of the collection, and thirty-six halftone illustrations of handwriting, taken from dated codices and reproduced next, or very close, to the relevant entries.