diff --git a/chapters/chap00.ipynb b/chapters/chap00.ipynb
index b42d9c0..e7c283c 100644
--- a/chapters/chap00.ipynb
+++ b/chapters/chap00.ipynb
@@ -50,7 +50,7 @@
     "\n",
     "Writing this book, I tried to be careful with the vocabulary.\n",
     "I define each term when it first appears.\n",
-    "And there is a glossary that the end of each chapter that reviews the terms that were introduced.\n",
+    "And there is a glossary at the end of each chapter that reviews the terms that were introduced.\n",
     "\n",
     "I also tried to be concise.\n",
     "The less mental effort it takes to read the book, the more capacity you will have for programming.\n",