diff --git a/app/__pycache__/__init__.cpython-36.pyc b/app/__pycache__/__init__.cpython-36.pyc
index d71f35d..419c685 100644
Binary files a/app/__pycache__/__init__.cpython-36.pyc and b/app/__pycache__/__init__.cpython-36.pyc differ
diff --git a/app/forms.py b/app/forms.py
index a4b251f..c9ccbb4 100755
--- a/app/forms.py
+++ b/app/forms.py
@@ -5,4 +5,5 @@ from wtforms.validators import InputRequired
 class UserForm(FlaskForm):
     title = StringField('title', validators=[InputRequired()])
     author = StringField('author', validators=[InputRequired()])
+    tag = StringField('tag', validators=[InputRequired()])
     file = FileField()
diff --git a/app/models.py b/app/models.py
index ebe947a..466bc0a 100755
--- a/app/models.py
+++ b/app/models.py
@@ -6,12 +6,14 @@ class Book(db.Model):
     title = db.Column(db.String(255))
     author = db.Column(db.String(255))
     file = db.Column(db.String(255))
+    tag = db.Column(db.String(255))
 
 
-    def __init__(self, title, author, file):
+    def __init__(self, title, author, file, tag):
         self.title = title
         self.author = author
         self.file = file
+        self.tag = tag
 
     def __repr__(self):
         return '<Title %r>' % self.title
@@ -22,7 +24,8 @@ class BookSchema(Schema):
     title = fields.Str()
     author = fields.Str()
     file = fields.Str()
+    tag = fields.Str()
 
 def must_not_be_blank(data):
     if not data:
-        raise ValidationError('Data not provided.')
+        raise ValidationError('You forgot to write stuff.')
diff --git a/app/templates/add_book.html b/app/templates/add_book.html
index a27cccd..d5f4654 100755
--- a/app/templates/add_book.html
+++ b/app/templates/add_book.html
@@ -18,6 +18,8 @@
     {{ form.csrf_token }}
     <div class="form-group">{{ form.title.label }} {{ form.title(size=20, class="form-control") }}</div>
     <div class="form-group">{{ form.author.label }} {{ form.author(size=20, class="form-control") }}</div>
+    <div class="form-group">{{ form.tag.label }} {{ form.tag(size=20, class="form-control") }}</div>
+
     {{ form.file }}
     <button type="submit" class="btn btn-primary">Upload</button>
 </form>
diff --git a/app/templates/show_books.html b/app/templates/show_books.html
index 1e592ee..a49fd53 100755
--- a/app/templates/show_books.html
+++ b/app/templates/show_books.html
@@ -19,11 +19,13 @@
     <tr>
       <th>Title</th>
       <th>Author</th>
+      <th>Tag</th>
     </tr>
         {% for book in books %}
     <tr>
       <td><a href="books/{{ book.id }}">{{ book.title }}</a></td>
       <td>{{ book.author }}</td>
+      <td>{{ book.tag}}</td>
     </tr>
   {% endfor %}
   </table>
diff --git a/app/views.py b/app/views.py
index 7a100e9..1233276 100755
--- a/app/views.py
+++ b/app/views.py
@@ -82,8 +82,9 @@ def add_book():
 
                 title = user_form.title.data # You could also have used request.form['name']
                 author = user_form.author.data # You could also have used request.form['email']
+                tag = user_form.tag.data
                 # save user to database
-                book = Book(title, author, filename)
+                book = Book(title, author, filename, tag)
                 db.session.add(book)
                 db.session.commit()
                 flash("%s added to the library" % (title))