diff --git a/manual/Makefile b/manual/Makefile
new file mode 100644
index 00000000..222a7747
--- /dev/null
+++ b/manual/Makefile
@@ -0,0 +1,6 @@
+
+all: freedoom-manual.pdf
+
+freedoom-manual.pdf: manual.adoc
+	asciidoctor-pdf -a toc manual.adoc
+
diff --git a/manual/README.adoc b/manual/README.adoc
new file mode 100644
index 00000000..fdaa940c
--- /dev/null
+++ b/manual/README.adoc
@@ -0,0 +1,6 @@
+
+`manual.adoc` contains Freedoom's manual. It is intended to be built
+as a PDF file but can also be viewed in HTML format. To build as a
+PDF, https://asciidoctor.org/[Asciidoctor] is required, since it has
+superior PDF output to the Asciidoc reference implementation.
+