diff --git a/src/backend/database.py b/src/backend/database.py
index 32b60c6..ab47368 100644
--- a/src/backend/database.py
+++ b/src/backend/database.py
@@ -22,6 +22,7 @@ from src.backend.db import (
     CREATE_TABLE_FILES,
     CREATE_TABLE_MEDIA,
     CREATE_TABLE_MESSAGES,
+    CREATE_TABLE_NEWEDITIONS,
     CREATE_TABLE_PROF,
     CREATE_TABLE_SUBJECTS,
     CREATE_TABLE_USER,
@@ -87,6 +88,7 @@ class Database:
             "elsa",
             "elsa_files",
             "elsa_media",
+            "neweditions",
         ]
 
         for table in required_tables:
@@ -116,6 +118,8 @@ class Database:
                 query = CREATE_ELSA_FILES_TABLE
             case "elsa_media":
                 query = CREATE_ELSA_MEDIA_TABLE
+            case "neweditions":
+                query = CREATE_TABLE_NEWEDITIONS
             case _:
                 log.error(f"Table {table_name} is not a valid table name")
         self.query_db(query)
@@ -233,7 +237,7 @@ class Database:
     def query_db(
         self,
         query: str,
-        args: Tuple[Any, Any] = (),  # type:ignore
+        args: Tuple[Any] = (),  # type:ignore
         one: bool = False,  # type:ignore
     ) -> Union[Tuple[Any, Any], List[Tuple[Any, Any]]]:
         """
@@ -430,9 +434,8 @@ class Database:
             app_id = row[2]
             prof_id = row[3]
 
-            sig_val = getattr(bookdata, "signature", None) or ""
-            title_val = getattr(bookdata, "title", None) or ""
-
+            sig_val = bookdata.signature
+            title_val = bookdata.title
             if mode == 1:
                 if sig_re.search(sig_val):
                     results.append((bookdata, app_id, prof_id))
@@ -471,7 +474,7 @@ class Database:
         """
         result = self.query_db(
             "SELECT id FROM media WHERE bookdata=? AND app_id=? AND prof_id=?",
-            (dump_pickle(bookdata), app_id, prof_id),
+            (bookdata.to_dict, app_id, prof_id),
             one=True,
         )
         return result[0]
@@ -535,17 +538,23 @@ class Database:
             ret_result.append(data)
         return ret_result
 
-    def getBooksByProfId(self, prof_id: int, deleted: int = 0):
+    def getBooksByProfId(
+        self, prof_id: int, deleted: int = 0
+    ) -> list[dict[str, Union[int, BookData]]]:
         """
         Get the Books based on the professor id
 
-        Args:
-            prof_id (str): The ID of the professor
-            deleted (int, optional): The state of the book. Set to 1 to include deleted ones. Defaults to 0.
+        Parameters
+        ----------
+        prof_id : int
+            The ID of the professor
+        deleted : int, optional
+            If set to 1, it will include deleted books, by default 0
 
-        Returns:
-
-            list[dict[int, BookData, int]]: A list of dictionaries containing the id, the metadata of the book and the availability of the book
+        Returns
+        -------
+        list[dict[str, Union[int, BookData]]]
+            A list of dictionaries containing the id, the metadata of the book and the availability of the book
         """
         qdata = self.query_db(
             f"SELECT id,bookdata,available FROM media WHERE prof_id={prof_id} AND (deleted={deleted if deleted == 0 else '1 OR deleted=0'})"
@@ -1170,7 +1179,7 @@ class Database:
             (semester, apparat_nr, apparat.name),
         )
         # delete all books associated with the app_id
-        print(apparat_nr, app_id)
+        # print(apparat_nr, app_id)
         self.query_db("UPDATE media SET deleted=1 WHERE app_id=?", (app_id,))
 
     def isEternal(self, id):
@@ -1243,11 +1252,11 @@ class Database:
             else False
         )
 
-    def checkApparatExistsById(self, app_id: Union[str, int]) -> bool:
-        """a check to see if the apparat is already present in the database, based on the id
+    def checkApparatExistsByNr(self, app_nr: Union[str, int]) -> bool:
+        """a check to see if the apparat is already present in the database, based on the nr. This query will exclude deleted apparats
 
         Args:
-            app_id (Union[str, int]): the id of the apparat
+            app_nr (Union[str, int]): the id of the apparat
 
         Returns:
             bool: True if the apparat is present, False if not
@@ -1255,7 +1264,9 @@ class Database:
         return (
             True
             if self.query_db(
-                "SELECT appnr FROM semesterapparat WHERE appnr=?", (app_id,), one=True
+                "SELECT id FROM semesterapparat WHERE appnr=? and deletion_status=0",
+                (app_nr,),
+                one=True,
             )
             else False
         )
@@ -1844,3 +1855,49 @@ class Database:
         result = cursor.fetchone()
         connection.close()
         return result
+
+    def getBookIdByPPN(self, ppn: str) -> int:
+        query = f"SELECT id FROM media WHERE bookdata LIKE '%{ppn}%'"
+        data = self.query_db(query)
+        if data:
+            return data[0][0]
+        else:
+            return None
+
+    def getNewEditionsByApparat(self, apparat_id: int) -> list[BookData]:
+        """Get all new editions for a specific apparat
+
+        Args:
+            apparat_id (int): the id of the apparat
+
+        Returns:
+            list[tuple]: A list of tuples containing the new editions data
+        """
+        query = "SELECT * FROM neweditions WHERE for_apparat=?"
+        results = self.query_db(query, (apparat_id,))
+        res = []
+        for result in results:
+            old_edition_edition = self.query_db(
+                "SELECT bookdata FROM media WHERE id=?", (result[2],), one=True
+            )
+            res.append(BookData().from_string(result[1]))
+        return res
+
+    def setOrdered(self, newBook_id: int):
+        query = "UPDATE neweditions SET ordered=1 WHERE id=?"
+        self.query_db(query, (newBook_id,))
+
+    def getNewEditionId(self, newBook: BookData):
+        query = "SELECT id FROM neweditions WHERE new_bookdata=?"
+        params = (newBook.to_dict,)
+        data = self.query_db(query, params, one=True)
+        if data:
+            return data[0]
+        else:
+            return None
+
+    def insertNewEdition(self, newBook: BookData, oldBookId: int, for_apparat: int):
+        query = "INSERT INTO neweditions (new_bookdata, old_edition_id, for_apparat) VALUES (?,?,?)"
+        params = (newBook.to_dict, oldBookId, for_apparat)
+
+        self.query_db(query, params)