diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 36b1329..1d64e5a 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -270,6 +270,8 @@
   },
   "active": "9aca980657068944",
   "lastOpenFiles": [
+    "conf/sed1hMVp9",
+    "conf/sed4bQnF2",
     "build/html/basic-book-builder.html",
     "conf/frontmatter.html",
     "conf/html.yaml",
@@ -282,9 +284,7 @@
     "build/html/lib/diag",
     "build/html/lib",
     "build/html/conf",
-    "build/html",
     "chapters/01_Getting_Started.md",
-    "build/pdf/basic-book-builder.pdf",
     "chapters/AppendixA.md",
     "chapters/00_Introduction.md",
     "build/html/lib/img/unit-circle-with-tau.png",
diff --git a/build/latex/basic-book-builder.log b/build/latex/basic-book-builder.log
index 2b9c073..d44125d 100644
--- a/build/latex/basic-book-builder.log
+++ b/build/latex/basic-book-builder.log
@@ -1,7 +1,6 @@
-This is XeTeX, Version 3.141592653-2.6-0.999994 (TeX Live 2022/Debian) (preloaded format=xelatex 2025.11.6)  5 FEB 2026 08:48
+This is XeTeX, Version 3.141592653-2.6-0.999994 (TeX Live 2022/Debian) (preloaded format=xelatex 2025.11.6)  5 FEB 2026 08:56
 entering extended mode
  restricted \write18 enabled.
- file:line:error style messages enabled.
  %&-line parsing enabled.
 **basic-book-builder.tex
 (./basic-book-builder.tex
diff --git a/build/latex/basic-book-builder.pdf b/build/latex/basic-book-builder.pdf
index 80e1b5f..61232c9 100644
Binary files a/build/latex/basic-book-builder.pdf and b/build/latex/basic-book-builder.pdf differ
diff --git a/build/latex/basic-book-builder.tex b/build/latex/basic-book-builder.tex
index 13cf989..a2c1741 100644
--- a/build/latex/basic-book-builder.tex
+++ b/build/latex/basic-book-builder.tex
@@ -372,7 +372,7 @@ Licensed under the Creative Commons Attribution-NoDerivatives 4.0 International
 \chapter*{Preface}\label{preface}
 \addcontentsline{toc}{chapter}{Preface}
 
-Preface t the Book\ldots{}
+Preface to the Book\ldots{}
 
 \chapter{Introduction}\label{introduction}
 
diff --git a/build/pdf/basic-book-builder.pdf b/build/pdf/basic-book-builder.pdf
index 80e1b5f..66ba424 100644
Binary files a/build/pdf/basic-book-builder.pdf and b/build/pdf/basic-book-builder.pdf differ