diff --git a/doc/COSMOS.md b/doc/COSMOS.md
index b4ca2f7..f04f9da 100644
--- a/doc/COSMOS.md
+++ b/doc/COSMOS.md
@@ -36,6 +36,12 @@ expanded and offers
  - `publicationimport`
  - `statistic`
 
+## eoa-latexclass
+A LaTeX document class for Edition Open Access books. This is used for
+the conversion from TEI to PDF. It is clearly modeled after the
+pre_eoa preambel of the EOATeX path, but uses mostly standard LaTeX
+commands, so that the tei2latex script can be re-used.
+
 ## eoa-django2-gitlab
 A prototype for the new EOA2 platform. It accepts TEI-XML documents as input.