The Obolus Press specializes in monographs about French and German painters, mostly but not exclusively from the Belle Époque and the early Modernist era.
From time to time the press will also venture into history, philosophy, and literature from the same periods.
Titles are distributed by Ingram in North America, by Gardners in the United Kingdom, and through the alibris for libraries program.
You will certainly find Obolus books on Amazon, but they are often out of stock or ridiculously overpriced.
To avoid this frustration, order from aerio (United States and Canada), blackwell's (UK) or the book depository (worldwide). There are direct links to these retailers on each page of the catalogue.