diff --git a/docs/guide/folder-note.md b/docs/guide/folder-note.md
new file mode 100644
index 000000000..cb636a457
--- /dev/null
+++ b/docs/guide/folder-note.md
@@ -0,0 +1,14 @@
+---
+slug: folder-note
+---
+
+# Folder notes
+
+For every folder `foo/` in your notebook, if a `foo.md` exists alongside it, it is consider a "folder note" that is associated with the folder. Likewise, an associated `foo.yaml` servers as the [[yaml-config]] for the entire folder and its contents recursively.
+
+The children of folder notes become its [[folgezettel|folgezettel]] children by default.
+
+{#index}
+## `index.md`
+
+Instead of `foo.md`, you can also use `foo/index.md` (or `index.org` if using [[orgmode]]) or `foo/index.yaml`. Internally, Emanote will treat them as `foo.md` and `foo.yaml` respectively.
\ No newline at end of file
diff --git a/docs/guide/folgezettel.md b/docs/guide/folgezettel.md
index 536a3f982..aa8f89352 100644
--- a/docs/guide/folgezettel.md
+++ b/docs/guide/folgezettel.md
@@ -23,7 +23,7 @@ Here is the [[target-note]]#
 {#folder}
 ## Folder notes
 
-By default, Emanote includes any directories in your note's path as vertices in the folgezettel graph. This makes the folder note a folgezettel parent of the child note. The contents of a folder, likewise, become folgezetten children of the folder note. For eg., in `foo/bar/qux.md`, "foo" is a folgezettel parent of "bar", and "bar" is a folgezettel parent of "qux".
+By default, Emanote includes any directories in your note's path as vertices in the folgezettel graph. This makes the [[folder-note|folder note]] a folgezettel parent of the child note. The contents of a folder, likewise, become folgezetten children of the [[folder-note|folder note]]. For eg., in `foo/bar/qux.md`, "foo" is a folgezettel parent of "bar", and "bar" is a folgezettel parent of "qux".
 
 >[!note]
 > The top-level root folder is not considered a folgezettel by default, unless you specify it (as shown below). This is to support the use-case of the user having a *flat list* of notes *without* subdirectories, but connected through [[folgezettel]].
@@ -38,4 +38,4 @@ emanote:
 ```
 
 >[!tip]
-> Put this configuration in `foo.md` if you want to disable folder folgezettel for just that folder `foo/`. Put it in `foo.yaml` if you want to disable it for `foo/` and all subfolders under it recursively. Put it in top-level `index.yaml` to disable it for all folders. See [[yaml-config]] for more details.
\ No newline at end of file
+> Put this configuration in `foo.md` if you want to disable folder folgezettel for just that [[folder-note|folder note]] `foo/`. Put it in `foo.yaml` if you want to disable it for `foo/` and all subfolders under it recursively. Put it in top-level `index.yaml` to disable it for all folders. See [[yaml-config]] for more details.
\ No newline at end of file
diff --git a/docs/guide/html-template/sidebar.md b/docs/guide/html-template/sidebar.md
index 73c1f7e25..da02630a2 100644
--- a/docs/guide/html-template/sidebar.md
+++ b/docs/guide/html-template/sidebar.md
@@ -4,7 +4,7 @@ In [[html-template|the default template]], the sidebar is rendered on the left s
 
 - The sidebar tree is collapsed by default. But this can be disabled by setting `template.sidebar.collapsed` to `false` in [[yaml-config]]
 - The ordering of children in the tree is determined in the following order (this is also the order in which [[query]] results are rendered by default):
-  1. if `template.sidebar.folders-first` is set to `true` (default `false`), directories are put before single notes, respecting the other order criteria. Otherwise, directories and notes will be interleaved.
+  1. if `template.sidebar.folders-first` is set to `true` (default `false`), directories (see [[folder-note]]) are put before single notes, respecting the other order criteria. Otherwise, directories and notes will be interleaved.
   2. If the `order` [[yaml-config|frontmatter]] metadata exists, use that as the primary sort key.
   3. If the note has a H1 title, use that as the secondary sort key; otherwise, use the note filename as the secondary sort key.
 
diff --git a/docs/guide/yaml-config.md b/docs/guide/yaml-config.md
index 246e61833..5695c1cb5 100644
--- a/docs/guide/yaml-config.md
+++ b/docs/guide/yaml-config.md
@@ -10,7 +10,7 @@ tags: [emanote/yaml/demo]
 
 # YAML configuration
 
-Configure your site metadata, rendering configuration and such using YAML configuration. Create a `foo.yaml` alongside `foo.md` or `foo/` folder, and those settings apply only to that route. The YAML structure is the same as your Markdown frontmatter, and vice-versa. Settings in the YAML frontmatter apply onto that Markdown route only; whereas settings in an individual .yaml file apply to that entire sub-route tree. Emanote does a deep-merge of the parent YAML configurations, so you can have children override only what's necessary. This is sometimes known as ["data cascade"](https://www.11ty.dev/docs/data-cascade/). The final merged YAML structure is passed to the HTML templates, of which you have full rendering control over.
+Configure your site metadata, rendering configuration and such using YAML configuration. Create a `foo.yaml` alongside `foo.md` (see [[folder-note]]) or `foo/` folder, and those settings apply only to that route. The YAML structure is the same as your Markdown frontmatter, and vice-versa. Settings in the YAML frontmatter apply onto that Markdown route only; whereas settings in an individual .yaml file apply to that entire sub-route tree. Emanote does a deep-merge of the parent YAML configurations, so you can have children override only what's necessary. This is sometimes known as ["data cascade"](https://www.11ty.dev/docs/data-cascade/). The final merged YAML structure is passed to the HTML templates, of which you have full rendering control over.
 
 Notice how this page's sidebar colorscheme has [changed to green]{.greenery}? View [the source of this page](https://github.com/srid/emanote/blob/master/docs/guide/yaml-config.md) to see the magic involved. That CSS greenery you just saw too comes from YAML.
 
diff --git a/emanote/CHANGELOG.md b/emanote/CHANGELOG.md
index dfdf4f77a..20cad4a10 100644
--- a/emanote/CHANGELOG.md
+++ b/emanote/CHANGELOG.md
@@ -6,6 +6,10 @@
   - Obsidian-style callouts ([\#466](https://github.com/srid/emanote/pull/466))
   - `emanote run --no-ws` option to disable WebSocket monitoring. This is useful for using Emanote to serve the HTML site directly on the internet, without needing to statically generate it.
   - Add query syntax for listing folgezetten children & parents ([\#476](https://github.com/srid/emanote/pull/476))
+  - Native support for combining multiple notebooks
+    - Resolve ambiguities based on closer common ancestor ([\#498](https://github.com/srid/emanote/pull/498))
+    - Support for folder "index.md" notes ([\#512](https://github.com/srid/emanote/pull/512))
+      - Instead of "foo/qux.md", you can now create "foo/qux/index.md"
   - **BACKWARDS INCOMPTABILE** changes
     - `feed.siteUrl` is now `page.siteUrl`
     - A new HTML template layout "default" (unifies and) replaces both "book" and "note" layout. ([\#483](https://github.com/srid/emanote/pull/483))
diff --git a/emanote/emanote.cabal b/emanote/emanote.cabal
index 8fb8ce874..f692fb7e8 100644
--- a/emanote/emanote.cabal
+++ b/emanote/emanote.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               emanote
-version:            1.3.12.0
+version:            1.3.13.0
 license:            AGPL-3.0-only
 copyright:          2022 Sridhar Ratnakumar
 maintainer:         srid@srid.ca
diff --git a/emanote/src/Emanote/Model/Note.hs b/emanote/src/Emanote/Model/Note.hs
index 97307bdc8..3c81c6648 100644
--- a/emanote/src/Emanote/Model/Note.hs
+++ b/emanote/src/Emanote/Model/Note.hs
@@ -49,7 +49,7 @@ data Feed = Feed
 
 data Note = Note
   { _noteRoute :: R.LMLRoute
-  , _noteLayerLoc :: Maybe Loc
+  , _noteSource :: Maybe (Loc, FilePath)
   -- ^ The layer from which this note came. Nothing if the note was auto-generated.
   , _noteDoc :: Pandoc
   , _noteMeta :: Aeson.Value
@@ -281,12 +281,12 @@ mkEmptyNoteWith someR (Pandoc mempty -> doc) =
   where
     meta = Aeson.Null
 
-mkNoteWith :: R.LMLRoute -> Maybe Loc -> Pandoc -> Aeson.Value -> [Text] -> Note
-mkNoteWith r layerLoc doc' meta errs =
+mkNoteWith :: R.LMLRoute -> Maybe (Loc, FilePath) -> Pandoc -> Aeson.Value -> [Text] -> Note
+mkNoteWith r src doc' meta errs =
   let (doc'', tit) = queryNoteTitle r doc' meta
       feed = queryNoteFeed meta
       doc = if null errs then doc'' else pandocPrepend (errorDiv errs) doc''
-   in Note r layerLoc doc meta tit errs feed
+   in Note r src doc meta tit errs feed
   where
     -- Prepend to block to the beginning of a Pandoc document (never before H1)
     pandocPrepend :: B.Block -> Pandoc -> Pandoc
@@ -309,14 +309,14 @@ parseNote ::
   (Loc, FilePath) ->
   Text ->
   m Note
-parseNote scriptingEngine pluginBaseDir r (layerLoc, fp) s = do
+parseNote scriptingEngine pluginBaseDir r src@(_, fp) s = do
   ((doc, meta), errs) <- runWriterT $ do
     case r of
       R.LMLRoute_Md _ ->
         parseNoteMarkdown scriptingEngine pluginBaseDir fp s
       R.LMLRoute_Org _ -> do
         parseNoteOrg s
-  pure $ mkNoteWith r (Just layerLoc) doc meta errs
+  pure $ mkNoteWith r (Just src) doc meta errs
 
 parseNoteOrg :: (MonadWriter [Text] m) => Text -> m (Pandoc, Aeson.Value)
 parseNoteOrg s =
diff --git a/emanote/src/Emanote/Model/Stork.hs b/emanote/src/Emanote/Model/Stork.hs
index 848ed386e..801ad59c4 100644
--- a/emanote/src/Emanote/Model/Stork.hs
+++ b/emanote/src/Emanote/Model/Stork.hs
@@ -33,7 +33,7 @@ renderStorkIndex model = do
 storkFiles :: Model -> [File]
 storkFiles model =
   flip mapMaybe (Ix.toList (model ^. M.modelNotes)) $ \note -> do
-    baseDir <- Loc.locPath <$> note ^. N.noteLayerLoc
+    baseDir <- Loc.locPath . fst <$> note ^. N.noteSource
     let fp = ((baseDir </>) $ R.withLmlRoute R.encodeRoute $ note ^. N.noteRoute)
         ft = case note ^. N.noteRoute of
           R.LMLRoute_Md _ -> FileType_Markdown
diff --git a/emanote/src/Emanote/Route/ModelRoute.hs b/emanote/src/Emanote/Route/ModelRoute.hs
index d890408b6..aa344395e 100644
--- a/emanote/src/Emanote/Route/ModelRoute.hs
+++ b/emanote/src/Emanote/Route/ModelRoute.hs
@@ -104,5 +104,5 @@ mkLMLRouteFromFilePath fp =
 mkLMLRouteFromKnownFilePath :: LML -> FilePath -> Maybe LMLRoute
 mkLMLRouteFromKnownFilePath lmlType fp =
   case lmlType of
-    Md -> fmap LMLRoute_Md (R.mkRouteFromFilePath fp)
-    Org -> fmap LMLRoute_Org (R.mkRouteFromFilePath fp)
+    Md -> fmap LMLRoute_Md (R.mkRouteFromFilePath' True fp)
+    Org -> fmap LMLRoute_Org (R.mkRouteFromFilePath' True fp)
diff --git a/emanote/src/Emanote/Route/R.hs b/emanote/src/Emanote/Route/R.hs
index 0b7b86d6c..84aa9fe1b 100644
--- a/emanote/src/Emanote/Route/R.hs
+++ b/emanote/src/Emanote/Route/R.hs
@@ -29,10 +29,19 @@ instance (HasExt ext) => Show (R ext) where
 
 -- | Convert foo/bar.<ext> to a @R@
 mkRouteFromFilePath :: forall a (ext :: FileType a). (HasExt ext) => FilePath -> Maybe (R ext)
-mkRouteFromFilePath fp = do
+mkRouteFromFilePath = mkRouteFromFilePath' False
+
+{- | Like `mkRouteFromFilePath` but drops the last slug if it's "index"
+
+Behaves like `mkRouteFromFilePath` for top-level files.
+-}
+mkRouteFromFilePath' :: forall a (ext :: FileType a). (HasExt ext) => Bool -> FilePath -> Maybe (R ext)
+mkRouteFromFilePath' dropIndex fp = do
   base <- withoutKnownExt @_ @ext fp
-  let slugs = fromString . toString . T.dropWhileEnd (== '/') . toText <$> splitPath base
-  viaNonEmpty R slugs
+  slugs <- nonEmpty $ fromString . toString . T.dropWhileEnd (== '/') . toText <$> splitPath base
+  if dropIndex && length slugs > 1 && last slugs == "index"
+    then viaNonEmpty R $ init slugs
+    else pure $ R slugs
 
 mkRouteFromSlugs :: NonEmpty Slug -> R ext
 mkRouteFromSlugs =
diff --git a/emanote/src/Emanote/Source/Patch.hs b/emanote/src/Emanote/Source/Patch.hs
index 0dcd849ee..17a6863e9 100644
--- a/emanote/src/Emanote/Source/Patch.hs
+++ b/emanote/src/Emanote/Source/Patch.hs
@@ -98,7 +98,7 @@ patchModel' layers noteF storkIndexTVar scriptingEngine fpType fp action = do
               log $ "Removing note: " <> toText fp
               pure $ M.modelDeleteNote r
     R.Yaml ->
-      case R.mkRouteFromFilePath fp of
+      case R.mkRouteFromFilePath' True fp of
         Nothing ->
           pure id
         Just r -> case action of
diff --git a/emanote/src/Emanote/View/Template.hs b/emanote/src/Emanote/View/Template.hs
index aa3809d39..f92334363 100644
--- a/emanote/src/Emanote/View/Template.hs
+++ b/emanote/src/Emanote/View/Template.hs
@@ -148,6 +148,8 @@ renderLmlHtml :: Model -> MN.Note -> LByteString
 renderLmlHtml model note = do
   let r = note ^. MN.noteRoute
       meta = patchMeta $ Meta.getEffectiveRouteMetaWith (note ^. MN.noteMeta) r model
+      sourcePath = fromMaybe (R.withLmlRoute R.encodeRoute r) $ do
+        fmap snd $ note ^. MN.noteSource
       -- Force a doctype into the generated HTML as a workaround for Heist
       -- discarding it. See: https://github.com/srid/emanote/issues/216
       withDoctype = ("<!DOCTYPE html>\n" <>)
@@ -169,7 +171,8 @@ renderLmlHtml model note = do
     "ema:note:title" ##
       C.titleSplice ctx (note ^. MN.noteTitle)
     "ema:note:source-path" ##
-      HI.textSplice (toText . R.withLmlRoute R.encodeRoute $ r)
+      HI.textSplice
+        $ toText sourcePath
     "ema:note:url" ##
       HI.textSplice (SR.siteRouteUrl model . SR.lmlSiteRoute $ (R.LMLView_Html, r))
     "emaNoteFeedUrl" ##
diff --git a/emanote/test/Emanote/Route/RSpec.hs b/emanote/test/Emanote/Route/RSpec.hs
index c7b643aa8..f561cf2d5 100644
--- a/emanote/test/Emanote/Route/RSpec.hs
+++ b/emanote/test/Emanote/Route/RSpec.hs
@@ -25,6 +25,15 @@ mkRouteFromFilePathSpec = describe "mkRouteFromFilePath" $ do
       mkRouteFromFilePath "foo/bar.md" === Just r2
     it "three slugs" . hedgehog $ do
       mkRouteFromFilePath "foo/bar/qux.md" === Just r3
+  describe "dropIndex" $ do
+    it "index route" . hedgehog $ do
+      mkRouteFromFilePath' True "index.md" === Just rIndex
+    it "single slug" . hedgehog $ do
+      mkRouteFromFilePath' True "foo.md" === Just r1
+    it "two slugs" . hedgehog $ do
+      mkRouteFromFilePath' True "foo/index.md" === Just r1
+    it "three slugs" . hedgehog $ do
+      mkRouteFromFilePath' True "foo/bar/index.md" === Just r2
 
 routeInitsSpec :: Spec
 routeInitsSpec = describe "routeInits" $ do