diff --git a/README.md b/README.md
index 42fcf70..4123218 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,7 @@ See `titles.txt` for the bookmark titles used by the script.
 -   Chapter 23: Electronic and Information Warfare
 -   Chapter 25: Surveillance or Privacy?
 -   Chapter 26: Managing the Development of Secure Systems
+-   Chapter 27: Assurance and Sustainability
 -   Bibliography
 
 ## How to generate the book?
diff --git a/meta.txt b/meta.txt
index 211c3b6..25fe3a7 100644
--- a/meta.txt
+++ b/meta.txt
@@ -113,6 +113,10 @@ BookmarkTitle: 26. Managing the Development of Secure Systems
 BookmarkLevel: 1
 BookmarkPageNumber: 737
 BookmarkBegin
-BookmarkTitle: Bibliography
+BookmarkTitle: 27. Assurance and Sustainability
 BookmarkLevel: 1
 BookmarkPageNumber: 779
+BookmarkBegin
+BookmarkTitle: Bibliography
+BookmarkLevel: 1
+BookmarkPageNumber: 817
diff --git a/titles.txt b/titles.txt
index 85d9072..8ce2d93 100644
--- a/titles.txt
+++ b/titles.txt
@@ -24,4 +24,5 @@ Preface
 23. Electronic and Information Warfare
 25. Surveillance or Privacy?
 26. Managing the Development of Secure Systems
+27. Assurance and Sustainability
 Bibliography
diff --git a/urls.txt b/urls.txt
index c5af7b6..ac457db 100644
--- a/urls.txt
+++ b/urls.txt
@@ -24,4 +24,5 @@ https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch22-3jun.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch23-may22.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch25-jul10.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch26-jul10.pdf
+https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-ch27-jul21.pdf
 https://www.cl.cam.ac.uk/~rja14/Papers/SEv3-bib-jan7.pdf