diff --git a/init_db.py b/init_db.py
index 137a5a6..09ecf1b 100644
--- a/init_db.py
+++ b/init_db.py
@@ -17,6 +17,10 @@ cur.execute("INSERT INTO cards (category_id, content) VALUES (?,?)",
 cur.execute("INSERT INTO cards (category_id, content) VALUES (?,?)",
             (1, 'This is not an Atlas'))
 
+cur.execute("INSERT INTO topics (content) VALUES (?)", ('mapping process',))
+cur.execute("INSERT INTO topics (content) VALUES (?)", ('Radical Neutrality',))
+cur.execute("INSERT INTO topics (content) VALUES (?)", ('Honeycomb documentation',))
+cur.execute("INSERT INTO topics (content) VALUES (?)", ('Metabolic Publishing',))
 
 # close conenction
 connection.commit()
diff --git a/library.db b/library.db
index 1aab9d2..88aba05 100644
Binary files a/library.db and b/library.db differ
diff --git a/schema.sql b/schema.sql
index b87090d..abcf3b9 100644
--- a/schema.sql
+++ b/schema.sql
@@ -1,12 +1,12 @@
 DROP TABLE IF EXISTS categories; -- is a list of categories(lists): type: reading_list, authors, notes, etc it's a type but type is also a keyword in python so better avoiding it
 DROP TABLE IF EXISTS cards; --the single entry of any category/type
-
+DROP TABLE IF EXISTS topics; -- test table weaved on measure for this test
 
 -- table creation
 CREATE TABLE categories (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
-    title TEXT NOT NULL
+    title TEXT NOT NULL -- remember to not write the comma here at the end of each table
 );
 
 CREATE TABLE cards (
@@ -15,4 +15,22 @@ CREATE TABLE cards (
     created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
     content TEXT NOT NULL,
     FOREIGN KEY (category_id) REFERENCES categories (id)
-);
\ No newline at end of file
+);
+
+-- CREATE TABLE relations (
+--     id INTEGER PRIMARY KEY AUTOINCREMENT,
+    
+-- )
+CREATE TABLE topics (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    content TEXT NOT NULL
+);
+
+-- join table cards-topic but will i need also topic-card?? having a table of relations would maybe be a better approach? and a table of actions? (like upload file)
+CREATE TABLE topic_cards (
+    id INTEGER NOT NULL,
+    topic_id INTEGER,
+    card_id INTEGER,
+    FOREIGN KEY (topic_id) REFERENCES topics(id)
+    FOREIGN KEY (card_id) REFERENCES cards(id)
+)
\ No newline at end of file