diff --git a/log-books/all.txt b/log-books/all.txt
index 74d375b..891f390 100644
--- a/log-books/all.txt
+++ b/log-books/all.txt
@@ -9,4 +9,9 @@ log_2024-03-25_171001.epub
 log_2024-03-25_171101.epub
 log_2024-03-25_172728.epub
 log_2024-03-25_172758.epub
-logs
+log_2024-03-25_180001.epub
+log_2024-03-25_180106.epub
+log_2024-03-25_180117.epub
+log_2024-03-25_180817.epub
+log_2024-03-25_181225.epub
+log_2024-03-25_182616.epub
diff --git a/logged_book.epub b/logged_book.epub
index 7ab8951..8c80617 100644
Binary files a/logged_book.epub and b/logged_book.epub differ
diff --git a/preface.html b/preface.html
new file mode 100644
index 0000000..e2139d9
--- /dev/null
+++ b/preface.html
@@ -0,0 +1 @@
+<h1>this is the preface</h1>