diff --git a/doc/ikarus-scheme-users-guide.pdf b/doc/ikarus-scheme-users-guide.pdf
new file mode 100644
index 0000000..5d701cc
Binary files /dev/null and b/doc/ikarus-scheme-users-guide.pdf differ
diff --git a/scheme/last-revision b/scheme/last-revision
index 5b2b56c..da66d92 100644
--- a/scheme/last-revision
+++ b/scheme/last-revision
@@ -1 +1 @@
-1645
+1646