diff --git a/src/access.py b/src/access.py
index 2bb508b..9d77a38 100644
--- a/src/access.py
+++ b/src/access.py
@@ -34,8 +34,24 @@ class Access:
         self.get_token()
         self.refreshing.set()
 
+    def sleep(timeout: float, retry=3):
+        def decorator(function):
+            def wrapper(*args, **kwargs):
+                retries = 0
+                while retries < retry:
+                    try:
+                        value = function(*args, **kwargs)
+                        if value is not None:
+                            return
+                    except:
+                        time.sleep(timeout)
+                        retries += 1
+            return wrapper
+        return decorator
+
     def set_credentials(self, url):
-        folder_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+        folder_path = os.path.dirname(
+            os.path.dirname(os.path.abspath(__file__)))
         config_path = os.path.join(folder_path, "config/api_config.json")
         with open(config_path, "r") as f:
             params = json.load(f)
@@ -82,7 +98,8 @@ class Access:
         response = requests.post(f'{self.url}/token', json=json_form)
 
         if response.status_code == 400:
-            raise Exception('400 Bad request: wrong request parameters for refreshing.')
+            raise Exception(
+                '400 Bad request: wrong request parameters for refreshing.')
         elif response.status_code == 401:
             self.get_token()
         elif response.status_code == 200:
@@ -100,7 +117,8 @@ class Access:
             self.refresh_token()
 
         self.refreshing.wait()
-        response = requests.get(f'{self.url}/doc-convert/{book_id}/file', headers=self.headers)
+        response = requests.get(
+            f'{self.url}/doc-convert/{book_id}/file', headers=self.headers)
 
         if response.status_code == 404:
             raise FileNotFoundError('404 Not Found: file have not found.')
@@ -112,28 +130,26 @@ class Access:
 
         return content
 
+    @sleep(3)
     def send_image(self, img_path, doc_id, img_content: bytes = None):
         if self.is_time_for_refreshing():
             self.refresh_token()
-
         self.refreshing.wait()
 
         img_obj = BytesIO(img_content) if img_content else open(img_path, 'rb')
         files = {
             'image': (os.path.basename(img_path), img_obj)
         }
-        response = requests.post(f'{self.url}/doc-convert/image', files=files, headers=self.headers)
+        response = requests.post(
+            f'{self.url}/doc-convert/image', files=files, headers=self.headers)
         img_obj.close()
 
-        if response.status_code == 400:
-            self.update_status(doc_id, self.ERROR)
-            raise Exception(f'400 Bad request: {response.json()["message"]}.')
-        elif response.status_code == 200:
+        if response.status_code == 200:
             img_url = response.json()['imageUrl']
         else:
             self.update_status(doc_id, self.ERROR)
-            raise Exception(f'{response.status_code}')
-
+            raise Exception(
+                f'{response.status_code} Bad request: {response.json()["message"]}.')
         return img_url
 
     def send_book(self, doc_id, content):
@@ -144,27 +160,26 @@ class Access:
         json_content = {
             'json': json.dumps(content)
         }
-        response = requests.post(f'{self.url}/doc-convert/{doc_id}/import', json=json_content, headers=self.headers)
+        response = requests.post(
+            f'{self.url}/doc-convert/{doc_id}/import', json=json_content, headers=self.headers)
 
-        if response.status_code == 400:
-            self.update_status(doc_id, self.ERROR)
-            raise Exception(f'400 Bad request')
-        elif response.status_code == 200:
+        if response.status_code == 200:
             pass
         else:
             self.update_status(doc_id, self.ERROR)
-            raise Exception(f'{response.status_code}')
+            raise Exception(
+                f'{response.status_code} Bad request: {response.json()["message"]}.')
 
     def update_status(self, doc_id, status):
         if self.is_time_for_refreshing():
             self.refresh_token()
 
         self.refreshing.wait()
-        response = requests.patch(f'{self.url}/doc-convert/{doc_id}/status/{status}', headers=self.headers)
+        response = requests.patch(
+            f'{self.url}/doc-convert/{doc_id}/status/{status}', headers=self.headers)
 
-        if response.status_code == 400:
-            raise Exception(f'400 Bad request')
-        elif response.status_code == 200:
+        if response.status_code == 200:
             pass
         else:
-            raise Exception(f'{response.status_code}')
+            raise Exception(
+                f'{response.status_code} Bad request: {response.json()["message"]}.')
\ No newline at end of file
diff --git a/src/epub_converter/html_epub_preprocessor.py b/src/epub_converter/html_epub_preprocessor.py
index 2359af1..bd83a59 100644
--- a/src/epub_converter/html_epub_preprocessor.py
+++ b/src/epub_converter/html_epub_preprocessor.py
@@ -33,7 +33,8 @@ def update_src_links_in_images(body_tag: Tag,
                                href2img_content: dict,
                                path_to_html,
                                access=None,
-                               path2aws_path=None):
+                               path2aws_path=None,
+                               book_id=None):
     img_tags = body_tag.find_all('img')
 
     for img in img_tags:
@@ -51,11 +52,11 @@ def update_src_links_in_images(body_tag: Tag,
                 new_folder = path2aws_path[path_to_img_from_root]
             else:
                 new_folder = save_image_to_aws(
-                    access, path_to_img_from_root, img_content, 'book_id')
+                    access, path_to_img_from_root, img_content, book_id)
                 path2aws_path[path_to_img_from_root] = new_folder
         else:
             new_folder = save_image_locally(
-                path_to_img_from_root, img_content, 'book_id')
+                path_to_img_from_root, img_content, book_id)
 
         img.attrs['src'] = str(new_folder)
         if img.attrs.get('width'):