diff --git a/gods/README b/gods/README
index 3e6cd37e7..a34733f02 100644
--- a/gods/README
+++ b/gods/README
@@ -39,6 +39,7 @@ Invisible books (with specific names):
 Can be accessed through determine_holy_arch() which will return the
 item's other_arch field.  For example, such book with name "avatar"
 determines the avatar archetype for the "summon avatar" prayer.
+Note that determine_holy_arch will return one random item if there are many.
 
 Invisible book with name "grace limit":