diff --git a/src/pyicloud_ipd/exceptions.py b/src/pyicloud_ipd/exceptions.py
index ef9c91729..80b7a6919 100644
--- a/src/pyicloud_ipd/exceptions.py
+++ b/src/pyicloud_ipd/exceptions.py
@@ -1,39 +1,50 @@
-
-class PyiCloudException(Exception):
-    pass
+"""Library exceptions."""
 
 
-class PyiCloudConnectionException(PyiCloudException):
-    pass
-
-class PyiCloudNoDevicesException(PyiCloudException):
+class PyiCloudException(Exception):
+    """Generic iCloud exception."""
     pass
 
 
-class PyiCloudAPIResponseError(PyiCloudException):
-    def __init__(self, reason, code):
+# API
+class PyiCloudAPIResponseException(PyiCloudException):
+    """iCloud response exception."""
+    def __init__(self, reason, code=None, retry=False):
         self.reason = reason
         self.code = code
-        message = reason
+        message = reason or ""
         if code:
             message += " (%s)" % code
+        if retry:
+            message += ". Retrying ..."
+
+        super().__init__(message)
 
-        super(PyiCloudAPIResponseError, self).__init__(message)
 
+class PyiCloudServiceNotActivatedException(PyiCloudAPIResponseException):
+    """iCloud service not activated exception."""
+    pass
 
+
+# Login
 class PyiCloudFailedLoginException(PyiCloudException):
+    """iCloud failed login exception."""
     pass
 
 
-class PyiCloud2SARequiredError(PyiCloudException):
-    def __init__(self, url):
-        message = "Two-step authentication required for %s" % url
-        super(PyiCloud2SARequiredError, self).__init__(message)
+class PyiCloud2SARequiredException(PyiCloudException):
+    """iCloud 2SA required exception."""
+    def __init__(self, apple_id):
+        message = "Two-step authentication required for account: %s" % apple_id
+        super().__init__(message)
 
 
-class NoStoredPasswordAvailable(PyiCloudException):
+class PyiCloudNoStoredPasswordAvailableException(PyiCloudException):
+    """iCloud no stored password exception."""
     pass
 
 
-class PyiCloudServiceNotActivatedErrror(PyiCloudAPIResponseError):
+# Webservice specific
+class PyiCloudNoDevicesException(PyiCloudException):
+    """iCloud no device exception."""
     pass