diff --git a/src/epub_converter/epub_converter.py b/src/epub_converter/epub_converter.py
index c9e3bbd..a93e577 100644
--- a/src/epub_converter/epub_converter.py
+++ b/src/epub_converter/epub_converter.py
@@ -40,6 +40,9 @@ class EpubConverter:
         # key = -1 for top level NavPoints
         self.adjacency_list: Dict[Union[NavPoint, -1], Union[list, None]] = {}
 
+        # list to offset Chapter_i on 1st level
+        self.offset_sub_nodes = []
+
         # container for all chapters soup objects
         # here soup object is only part of the .xhtml file
         self.href_chapter_id2soup_html: Dict[tuple, BeautifulSoup] = {}
@@ -179,7 +182,6 @@ class EpubConverter:
 
         return links
 
-    # t_nodes = []
     def build_adjacency_list_from_toc(self, element, lvl=0):
         """
         self.adjacency_list builds based on TOC nested structure, got from self.ebooklib.toc
@@ -211,27 +213,29 @@ class EpubConverter:
                     nav_point.id)
 
             sub_nodes = []
-            for i in second:
-                # if 'chapter' in (i.title.lower() if isinstance(i, Link) else i[0].title.lower()):
-                #     self.t_nodes.append(self.build_adjacency_list_from_toc(i, lvl))
-                # else:
-                sub_nodes.append(
-                    self.build_adjacency_list_from_toc(i, lvl + 1))
-            self.adjacency_list[nav_point] = sub_nodes
+            for elem in second:
+                if 'chapter' in (elem.title.lower() if isinstance(elem, Link) else elem[0].title.lower()):
+                    self.offset_sub_nodes.append(self.build_adjacency_list_from_toc(elem, lvl))
+                else:
+                    sub_nodes.append(
+                        self.build_adjacency_list_from_toc(elem, lvl + 1))
+
+            self.adjacency_list[nav_point] = sub_nodes or self.offset_sub_nodes
             self.hrefs_added_to_toc.add(nav_point.href)
             return nav_point
 
         elif isinstance(element, list) and (lvl == 0):
             nodes = []
-            for i in element:
+            # go through every element
+            for elem in element:
                 nodes.append(
-                    self.build_adjacency_list_from_toc(i, lvl + 1))
-            #     for j in self.t_nodes:
-            #         nodes.append(j)
-            #     self.t_nodes = []
-            #
-            # self.adjacency_list[-1] = nodes
+                    self.build_adjacency_list_from_toc(elem, lvl + 1))
+                # go through every offset sub element
+                for offset_sub_node in self.offset_sub_nodes:
+                    nodes.append(offset_sub_node)
+                self.offset_sub_nodes = []
 
+            self.adjacency_list[-1] = nodes
         else:
             assert 0, f'Error. Element is not tuple/Link/list instance: {type(element)}'
 
@@ -460,7 +464,7 @@ class EpubConverter:
                                                                     path_to_html=nav_point.href,
                                                                     access=self.access,
                                                                     path2aws_path=self.book_image_src_path2aws_path,
-                                                                    book_id=self.file.stem if hasattr(self.file, self.file.stem) else 'book_id')
+                                                                    book_id=self.file.stem if hasattr(self.file, 'stem') else 'book_id')
 
         is_chapter = lvl <= LiveCartaConfig.SUPPORTED_LEVELS
         title_preprocessed = prepare_title(title)
@@ -506,7 +510,7 @@ if __name__ == "__main__":
 
     logger_object = BookLogger(name=f'epub', main_logger=logger, book_id=0)
 
-    json_converter = EpubConverter('../../epub/9781614382263.epub',
+    json_converter = EpubConverter('../../epub/9781634259804.epub',
                                    logger=logger_object)
     tmp = json_converter.convert_to_dict()