J.N. Herlin, Inc. is an online antiquarian bookshop specializing in primary sources and documentary material related to twentieth-century art history. Its offerings include publications and other historical items, as well as catalogues and lists the shop published before the Internet, now available online. New items are added on an ongoing basis.

The shop states that publications and other items are in their original form and in very good condition unless otherwise noted. Listings marked with an asterisk may have damage, as described in the relevant item details. Customers can browse and order through the website, while inquiries about individual items or access to files can be directed to Jean-Noël Herlin. The business is based in New York City and receives visitors by appointment only.

Prices are net and may change. Customers with special shipping or insurance needs are encouraged to get in touch before ordering. The shop lists standard shipping charges for international destinations and provides separate guidance for European Union shipments, including notice of customs duties on certain imports from the United States. Visitors can also join the mailing list to receive updates.