diff --git a/fastkml/features.py b/fastkml/features.py
index 721f27b4..7d6702a8 100644
--- a/fastkml/features.py
+++ b/fastkml/features.py
@@ -6,7 +6,6 @@
 
 import logging
 from dataclasses import dataclass
-from typing import Any
 from typing import Dict
 from typing import Iterator
 from typing import List
@@ -64,7 +63,6 @@ class _Feature(TimeMixin, _BaseObject):
         * Container (Document, Folder)
         * Placemark
         * Overlay
-    Not Implemented Yet:
         * NetworkLink.
     """
 
@@ -231,39 +229,20 @@ def view(self, camera: Optional[Union[Camera, LookAt]]) -> None:
         self._view = camera
 
     @property
-    def link(self):
-        return self._atom_link.href
+    def link(self) -> atom.Link:
+        return self._atom_link
 
     @link.setter
-    def link(self, url) -> None:
-        if isinstance(url, str):
-            self._atom_link = atom.Link(href=url)
-        elif isinstance(url, atom.Link):
-            self._atom_link = url
-        elif url is None:
-            self._atom_link = None
-        else:
-            raise TypeError
+    def link(self, link: Optional[atom.Link]) -> None:
+        self._atom_link = link
 
     @property
-    def author(self) -> None:
-        if self._atom_author:
-            return self._atom_author.name
-        return None
+    def author(self) -> Optional[atom.Author]:
+        return self._atom_author
 
     @author.setter
-    def author(self, name) -> None:
-        if isinstance(name, atom.Author):
-            self._atom_author = name
-        elif isinstance(name, str):
-            if self._atom_author is None:
-                self._atom_author = atom.Author(ns=config.ATOMNS, name=name)
-            else:
-                self._atom_author.name = name
-        elif name is None:
-            self._atom_author = None
-        else:
-            raise TypeError
+    def author(self, author: Optional[atom.Author]) -> None:
+        self._atom_author = author
 
     def append_style(self, style: Union[Style, StyleMap]) -> None:
         """Append a style to the feature."""
@@ -481,7 +460,7 @@ def __init__(
         atom_author: Optional[atom.Author] = None,
         address: Optional[str] = None,
         phone_number: Optional[str] = None,
-        snippet: Optional[Union[str, Dict[str, Any]]] = None,
+        snippet: Optional[Snippet] = None,
         description: Optional[str] = None,
         view: Optional[Union[Camera, LookAt]] = None,
         times: Optional[Union[TimeSpan, TimeStamp]] = None,
@@ -654,7 +633,7 @@ def __init__(
         atom_author: Optional[atom.Author] = None,
         address: Optional[str] = None,
         phone_number: Optional[str] = None,
-        snippet: Optional[Union[str, Dict[str, Any]]] = None,
+        snippet: Optional[Snippet] = None,
         description: Optional[str] = None,
         view: Optional[Union[Camera, LookAt]] = None,
         times: Optional[Union[TimeSpan, TimeStamp]] = None,
diff --git a/tests/oldunit_test.py b/tests/oldunit_test.py
index 05d512c3..454cd95a 100644
--- a/tests/oldunit_test.py
+++ b/tests/oldunit_test.py
@@ -169,7 +169,10 @@ def test_document(self) -> None:
 
     def test_author(self) -> None:
         d = kml.Document()
-        d.author = "Christian Ledermann"
+        d.author = atom.Author(
+            ns="{http://www.w3.org/2005/Atom}",
+            name="Christian Ledermann",
+        )
         assert "Christian Ledermann" in str(d.to_string())
         a = atom.Author(
             ns="{http://www.w3.org/2005/Atom}",
@@ -178,7 +181,6 @@ def test_author(self) -> None:
             email="cl@donotreply.com",
         )
         d.author = a
-        assert d.author == "Nobody"
         assert "Christian Ledermann" not in str(d.to_string())
         assert "Nobody" in str(d.to_string())
         assert "http://localhost" in str(d.to_string())
@@ -190,11 +192,10 @@ def test_author(self) -> None:
 
     def test_link(self) -> None:
         d = kml.Document()
-        d.link = "http://localhost"
+        d.link = atom.Link(ns=config.ATOMNS, href="http://localhost")
         assert "http://localhost" in str(d.to_string())
         d.link = atom.Link(ns=config.ATOMNS, href="#here")
         assert "#here" in str(d.to_string())
-        # pytest.raises(TypeError, d.link, object)
         d2 = kml.Document()
         d2.from_string(d.to_string())
         assert d.to_string() == d2.to_string()
@@ -538,7 +539,8 @@ def test_snippet(self) -> None:
         assert next(iter(k.features())).snippet.text == "Short Desc"
         assert next(iter(k.features())).snippet.max_lines == 2
         next(iter(k.features()))._snippet = features.Snippet(
-            text="Another Snippet", max_lines=3
+            text="Another Snippet",
+            max_lines=3,
         )
         assert 'maxLines="3"' in k.to_string()
         next(iter(k.features())).snippet = features.Snippet(text="Another Snippet")