diff --git a/content/books/things-i-learnt/_index.md b/content/books/things-i-learnt/_index.md
index 127463f..8bf37ff 100644
--- a/content/books/things-i-learnt/_index.md
+++ b/content/books/things-i-learnt/_index.md
@@ -36,7 +36,6 @@ template = "section-contentless.html"
 	* Project Organization
 		* [Organize Your Code by Data/Type, Not Functionality](project-organization)
 		* [Create Libraries](libraries)
-		* [The Config File Is Friend](config-file)
 	* Writing code
 		* [Be Ready To Throw Your Code Away](throw-away)
 		* [Future Thinking Is Future Trashing](future-trashing)
@@ -52,6 +51,8 @@ template = "section-contentless.html"
 		* [Start Stupid](start-stupid)
 		* [Always Use Timezones With Your Dates](use-timezones)
 		* [Always Use UTF-8 For Your Strings](use-utf8)
+	* "Usability"
+		* [The Config File Is Friend](config-file)
 		* [Logs Are For Events, Not User Interface](log-events)
 		* [Learn To Monitor](monitoring)
 * Community/Teams
diff --git a/content/books/things-i-learnt/config-file/index.md b/content/books/things-i-learnt/config-file/index.md
index 8d87027..5888858 100644
--- a/content/books/things-i-learnt/config-file/index.md
+++ b/content/books/things-i-learnt/config-file/index.md
@@ -52,4 +52,4 @@ you'll find that you're half-way through it.
 [^1]: In other words, they have a [time to
   live](https://en.wikipedia.org/wiki/Time_to_live).
 
-{{ chapters(prev_chapter_link="/books/things-i-learnt/libraries", prev_chapter_title="Create Libraries", next_chapter_link="/books/things-i-learnt/throw-away", next_chapter_title="Be Ready To Throw Your Code Away") }}
+{{ chapters(prev_chapter_link="/books/things-i-learnt/use-utf8", prev_chapter_title="Always Use UTF-8 For Your Strings", next_chapter_link="/books/things-i-learnt/log-events", next_chapter_title="Logs Are For Events, Not User Interface") }}
diff --git a/content/books/things-i-learnt/libraries/index.md b/content/books/things-i-learnt/libraries/index.md
index 2c4cd2a..ac3a563 100644
--- a/content/books/things-i-learnt/libraries/index.md
+++ b/content/books/things-i-learnt/libraries/index.md
@@ -45,4 +45,4 @@ your control, they are external to the project. So you may need to learn how
 to deal with this before creating the libraries. And, unfortunately, each
 language and build tool has its own way to manage this.
 
-{{ chapters(prev_chapter_link="/books/things-i-learnt/project-organization", prev_chapter_title="Organize Your Code by Data/Type, Not Functionality", next_chapter_link="/books/things-i-learnt/config-file", next_chapter_title="The Config File Is Friend") }}
+{{ chapters(prev_chapter_link="/books/things-i-learnt/project-organization", prev_chapter_title="Organize Your Code by Data/Type, Not Functionality", next_chapter_link="/books/things-i-learnt/throw-away", next_chapter_title="Be Ready To Throw Your Code Away") }}
diff --git a/content/books/things-i-learnt/log-events/index.md b/content/books/things-i-learnt/log-events/index.md
index edeb658..225eebc 100644
--- a/content/books/things-i-learnt/log-events/index.md
+++ b/content/books/things-i-learnt/log-events/index.md
@@ -43,4 +43,4 @@ could have the values to try to figure out why it failed -- surely, logging
 why it failed also helps, but you know what I mean. This is an example of
 something that makes complete sense in logs, but not in user interfaces.
 
-{{ chapters(prev_chapter_link="/books/things-i-learnt/use-utf8", prev_chapter_title="Always Use UTF-8 For Your Strings", next_chapter_link="/books/things-i-learnt/monitoring", next_chapter_title=Learn To Monitor"") }}
+{{ chapters(prev_chapter_link="/books/things-i-learnt/config-file", prev_chapter_title="The Config File Is Friend", next_chapter_link="/books/things-i-learnt/monitoring", next_chapter_title=Learn To Monitor"") }}
diff --git a/content/books/things-i-learnt/use-utf8/index.md b/content/books/things-i-learnt/use-utf8/index.md
index 2534afe..3d24960 100644
--- a/content/books/things-i-learnt/use-utf8/index.md
+++ b/content/books/things-i-learnt/use-utf8/index.md
@@ -52,4 +52,4 @@ single character. Walking through the whole string would require traversing
 the string character by character, instead of simply jumping straight to the
 proper position. But that's a price worth paying, in the long run.
 
-{{ chapters(prev_chapter_link="/books/things-i-learnt/use-timezones", prev_chapter_title="Always Use Timezones With Your Dates", next_chapter_link="/books/things-i-learnt/log-events", next_chapter_title="Logs Are For Events, Not User Interface") }}
+{{ chapters(prev_chapter_link="/books/things-i-learnt/use-timezones", prev_chapter_title="Always Use Timezones With Your Dates", next_chapter_link="/books/things-i-learnt/config-file", next_chapter_title="The Config File Is Friend") }}