diff --git a/src/Haboli/Euphoria/Listing.hs b/src/Haboli/Euphoria/Listing.hs
index 0e53fa4..4f65218 100644
--- a/src/Haboli/Euphoria/Listing.hs
+++ b/src/Haboli/Euphoria/Listing.hs
@@ -1,5 +1,8 @@
 {-# LANGUAGE OverloadedStrings #-}
 
+-- | A 'Listing' helps keep track of a bot's own 'SessionView' as well as all
+-- other clients connected to a room. It must be kept up-to-date manually.
+
 module Haboli.Euphoria.Listing
   ( Listing
   , newListing
@@ -18,6 +21,9 @@ import qualified Data.Text              as T
 import           Haboli.Euphoria.Api
 import           Haboli.Euphoria.Client
 
+-- | A listing contains a bot's own 'SessionView' (accessible via 'self') and a
+-- map of all other clients currently connected to the room (accessible via
+-- 'others'). The latter never includes the bot itself.
 data Listing = Listing
   { lsSelf   :: SessionView
   , lsOthers :: Map.Map UserId SessionView
@@ -26,21 +32,29 @@ data Listing = Listing
 othersFromList :: [SessionView] -> Map.Map UserId SessionView
 othersFromList sessions = Map.fromList [(svId sv, sv) | sv <- sessions]
 
+-- | Create a new 'Listing' based on a 'HelloEvent' and a 'SnapshotEvent'.
 newListing :: (HelloEvent, SnapshotEvent) -> Listing
 newListing (h, s) = Listing
   { lsSelf   = helloSessionView h
   , lsOthers = othersFromList $ snapshotListing s
   }
 
+-- | The 'SessionView' describing the bot itself.
 self :: Listing -> SessionView
 self = lsSelf
 
+-- | The 'SessionView's describing the other clients connected to the current
+-- room. Does not include the bot's own 'SessionView' (use 'self' to access
+-- that).
 others :: Listing -> Map.Map UserId SessionView
 others = lsOthers
 
+-- | Set the bot's own nick to a new nick.
 updateOwnNick :: T.Text -> Listing -> Listing
 updateOwnNick name listing = listing{lsSelf = (lsSelf listing){svNick = name}}
 
+-- | Set the bot's nick and update the 'Listing' with the server's reply in one
+-- go.
 preferNick :: T.Text -> Listing -> Client e Listing
 preferNick name listing
   | name == svNick (self listing) = pure listing
@@ -48,6 +62,9 @@ preferNick name listing
       (_, newNick) <- nick name
       pure $ updateOwnNick newNick listing
 
+-- | Update a 'Listing' from a list of sessions currently connected to the room.
+-- Afterwards, the 'Listing' will contain only those sessions present in the
+-- list.
 updateFromList :: [SessionView] -> Listing -> Listing
 updateFromList sessions listing =
   let ownId = svId $ lsSelf listing
@@ -62,6 +79,8 @@ onJoin sv listing = listing{lsOthers = Map.insert (svId sv) sv $ lsOthers listin
 onPart :: SessionView -> Listing -> Listing
 onPart sv listing = listing{lsOthers = Map.delete (svId sv) $ lsOthers listing}
 
+-- | Update a 'Listing' based on an 'Event'. Follows the euphoria documentation
+-- for 'JoinEvent', 'PartEvent' and 'NetworkEvent'.
 updateFromEvent :: Event -> Listing -> Listing
 updateFromEvent (EventJoin e) listing = onJoin (joinSession e) listing
 updateFromEvent (EventPart e) listing = onPart (partSession e) listing