diff --git a/src/moira/event.cljs b/src/moira/event.cljs
index a98335a..1aa5d18 100644
--- a/src/moira/event.cljs
+++ b/src/moira/event.cljs
@@ -1,5 +1,5 @@
 (ns moira.event
-  "Implement [[Factory]] for producing Application Events with unique
+  "Create [[Factory]] for producing Application Events with unique
   [[EventId|Event IDs]] and guaranteed ordering based on a
   [logical clock](https://en.wikipedia.org/wiki/Logical_clock)."
 
diff --git a/src/moira/log/module.cljs b/src/moira/log/module.cljs
index 9bfb461..5debd27 100644
--- a/src/moira/log/module.cljs
+++ b/src/moira/log/module.cljs
@@ -1,17 +1,33 @@
 (ns moira.log.module
+  "Instrument Application Log by setting up
+  [[moira.log.event-emitter/EventEmitter|EventEmitter]] as a module."
+
   (:require [clojure.spec.alpha :as s]
             [moira.log.event-emitter :as event-emitter]))
 
-(defn start [state]
+(defn start
+  "Create an [[moira.log.event-emitter/EventEmitter|EventEmitter] instance and
+  store it as part of the module's `state`."
+
+  [state]
+
   (assoc state :event-emitter (event-emitter/create)))
 
-(defn stop [{:keys [event-emitter]}]
+(defn stop
+  "Wrap up [[moira.log.event-emitter/EventEmitter|EventEmitter] instance and
+  clear module's `state`."
+
+  [{:keys [event-emitter]}]
+
   (event-emitter/unlisten event-emitter)
   nil)
 
 (s/def ::export (s/map-of #{:off :on :put} ifn?))
 
-(defn export [{:keys [event-emitter]}]
+(defn export
+  "Export API for interacting with the Application Log."
+
+  [{:keys [event-emitter]}]
 
   {:post [(s/valid? ::export %)]}
 
@@ -19,6 +35,10 @@
    :on (partial event-emitter/listen event-emitter)
    :put (partial event-emitter/emit event-emitter)})
 
-(def default {:export #'export
-              :start #'start
-              :stop #'stop})
+(def default
+  "Defaults that will automatically be injected into each
+  [[moira.application/Application|Application]] as `:app-log`."
+
+  {:export #'export
+   :start #'start
+   :stop #'stop})
diff --git a/src/moira/log/txs.cljs b/src/moira/log/txs.cljs
index 53b43bb..fbb26ce 100644
--- a/src/moira/log/txs.cljs
+++ b/src/moira/log/txs.cljs
@@ -1,6 +1,5 @@
 (ns moira.log.txs
-  "Interceptors for integrating `:app-log` into the
-  [[moira.transition|transition]] flow."
+  "Integrate `:app-log` into the [[moira.transition|transition]] flow."
 
   (:require [moira.log.event-emitter :as event-emitter]
             [moira.log.module :as log.module]