diff --git a/grawlix/sources/ereolen.py b/grawlix/sources/ereolen.py
index 5b88afd..42aea5d 100644
--- a/grawlix/sources/ereolen.py
+++ b/grawlix/sources/ereolen.py
@@ -23,7 +23,7 @@ class Ereolen(Source):
         .read_text("utf8") \
         .split("\n")
     match: list[str] = [
-        rf"https://(www.)?({"|".join(library_domains)})/reader\?orderid=.+$",
+        rf"https://(www.)?({'|'.join(library_domains)})/reader\?orderid=.+$",
     ]
     _authentication_methods = [ "login" ]
 
diff --git a/grawlix/sources/nextory.py b/grawlix/sources/nextory.py
index 433a3ec..16ddae2 100644
--- a/grawlix/sources/nextory.py
+++ b/grawlix/sources/nextory.py
@@ -37,7 +37,7 @@ class Nextory(Source):
         session_response = await self._client.post(
             "https://api.nextory.com/user/v1/sessions",
             json = {
-                "isbn": username,
+                "identifier": username,
                 "password": password
             },
         )
@@ -144,7 +144,7 @@ class Nextory(Source):
         for format_type in ("epub", "pdf"):
             for fmt in product_data["formats"]:
                 if fmt["type"] == format_type:
-                    return (format_type, fmt["isbn"])
+                    return (format_type, fmt["identifier"])
         raise InvalidUrl
 
 
diff --git a/grawlix/sources/storytel.py b/grawlix/sources/storytel.py
index f5f2566..a4d1cae 100644
--- a/grawlix/sources/storytel.py
+++ b/grawlix/sources/storytel.py
@@ -21,7 +21,7 @@ class Storytel(Source):
 
     # Authentication methods
 
-    async def login(self, username: str, password: str, **kwargs) -> None:
+    async def login(self, url: str, username: str, password: str) -> None:
         self.__username = username
         self.__password = self.encrypt_password(password)
         self._client.headers.update({"User-Agent": "Storytel/23.49 (Android 13; Pixel 6) Release/2288481"})