diff --git a/README.md b/README.md
index a84bcb8..b4df990 100644
--- a/README.md
+++ b/README.md
@@ -108,7 +108,8 @@ To follow these steps please install [git-lfs][gl] and [git-sig][gs].
 
 ## Usage
 
-Usage instructions can be found in the `keyfork-user-guide` mdBook.
+Usage instructions can be found in the `keyfork-user-guide` mdBook, which can
+be opened in-browser by running `mdbook serve --open keyfork-user-guide`.
 
 <!--
 ```
diff --git a/keyfork-user-guide/src/bin/keyfork-shard/openpgp/combine.md b/keyfork-user-guide/src/bin/keyfork-shard/openpgp/combine.md
index 7c5d66e..e728221 100644
--- a/keyfork-user-guide/src/bin/keyfork-shard/openpgp/combine.md
+++ b/keyfork-user-guide/src/bin/keyfork-shard/openpgp/combine.md
@@ -6,7 +6,7 @@ Combine `threshold` shares into a previously [`split`] secret.
 
 `keyfork-shard-combine-openpgp [key_discovery]`
 
-* `key_discovery`: A directory containing OpenPGP keys.
+* `key_discovery`: A file or directory containing OpenPGP keys.
   If the number of keys found is less than `threshold`, an OpenPGP Card
   fallback will be used to decrypt the rest of the messages.