diff --git a/.gitignore b/.gitignore
index daed6f4..a62d85b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,7 +17,7 @@
 *.log
 *.lot
 *.out
-*.pdf
+ledgersmb-book.pdf
 *.toc
 *.txss2
 *.xml
diff --git a/wf1.pdf b/wf1.pdf
new file mode 100644
index 0000000..26a35da
Binary files /dev/null and b/wf1.pdf differ
diff --git a/wf2.pdf b/wf2.pdf
new file mode 100644
index 0000000..0216435
Binary files /dev/null and b/wf2.pdf differ