diff --git a/books/bookvol0.pamphlet b/books/bookvol0.pamphlet
index 03af651..3eec8d4 100644
--- a/books/bookvol0.pamphlet
+++ b/books/bookvol0.pamphlet
@@ -1091,7 +1091,7 @@ subdomain objects.
 
 \subsection{Domains Have Types Called Categories}
 
-Domain and subdomains in Axiom are themselves objects that have
+Domains and subdomains in Axiom are themselves objects that have
 types.  The type of a domain or subdomain is called a {\it category}.
 \index{category} Categories are described by programs of the form:
 
diff --git a/books/bookvol1.pamphlet b/books/bookvol1.pamphlet
index 28d5eab..6113144 100644
--- a/books/bookvol1.pamphlet
+++ b/books/bookvol1.pamphlet
@@ -959,7 +959,7 @@ subdomain objects.
 
 \subsection{Domains Have Types Called Categories}
 
-Domain and subdomains in Axiom are themselves objects that have
+Domains and subdomains in Axiom are themselves objects that have
 types.  The type of a domain or subdomain is called a {\it category}.
 \index{category} Categories are described by programs of the form:
 
diff --git a/changelog b/changelog
index 19d21ba..d1c602f 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,6 @@
+20130314 tpd src/axiom-website/patches.html 20130314.04.jzc.patch
+20130314 jzc books/bookvol1 fix typo
+20130314 jzc books/bookvol0 fix typo
 20130314 tpd src/axiom-website/patches.html 20130314.03.tpd.patch
 20130314 tpd changlog. fix jzc email address
 20130314 tpd src/axiom-website/patches.html 20130314.02.tpd.patch
diff --git a/src/axiom-website/patches.html b/src/axiom-website/patches.html
index 66ed9d5..84d0e8b 100644
--- a/src/axiom-website/patches.html
+++ b/src/axiom-website/patches.html
@@ -4035,5 +4035,7 @@ books/bookvol10.4 GRAY fixed 20467
 readme add Jia Zhao Cong
 <a href="patches/20130314.03.tpd.patch">20130314.03.tpd.patch</a>
 changlog. fix jzc email address
+<a href="patches/20130314.04.jzc.patch">20130314.04.jzc.patch</a>
+books/bookvol0, books/bookvol1 fix typo
  </body>
 </html>