Current Epigraphy runs a series of posts on rare publications. Here's one in ceramics:
Bejaoui, F. (1997) Céramique et Religion Chrétienne: les thèmes bibliques sur la sigillée africaine, Tunis. (worldcat)
According to Worldcat, it is held by five American and two European institutions.
By way of reaction, the sometimes poor black-and-white images don't detract from this being a useful collection of interesting iconography.