diff --git a/ebooklib/epub.py b/ebooklib/epub.py
index 34167cc..4229a9e 100644
--- a/ebooklib/epub.py
+++ b/ebooklib/epub.py
@@ -22,6 +22,8 @@
 import posixpath as zip_path
 import os.path
 from collections import OrderedDict
+import unicodedata
+import  urllib
 
 try:
     from urllib.parse import unquote
@@ -1416,7 +1418,9 @@ def load(self):
     def read_file(self, name):
         # Raises KeyError
         name = zip_path.normpath(name)
-        return self.zf.read(name)
+        parsed_name = urllib.parse.unquote(name)
+        normalized_name = unicodedata.normalize('NFC', parsed_name)
+        return self.zf.read(normalized_name)
 
     def _load_container(self):
         meta_inf = self.read_file('META-INF/container.xml')