diff --git a/source/main.ptx b/source/main.ptx
index d69fe92..76cf4b9 100644
--- a/source/main.ptx
+++ b/source/main.ptx
@@ -6,7 +6,7 @@
 
   <book xml:id="wdmd">
     <title>What Do Mathematicians Do?</title>
-    <subtitle>An Overview of Undergraduate Mathematics</subtitle>
+    <subtitle>Fight Fascists</subtitle>
 
     <!-- Include frontmatter -->
     <xi:include href="./frontmatter.ptx" />