diff --git a/cps/editbooks.py b/cps/editbooks.py
index 2da9991f..f8431725 100644
--- a/cps/editbooks.py
+++ b/cps/editbooks.py
@@ -567,6 +567,12 @@ def upload():
             filepath = os.path.join(config.config_calibre_dir, author_dir, title_dir)
             saved_filename = os.path.join(filepath, title_dir + meta.extension.lower())
 
+            if unicode(title) != u'Unknown' and unicode(authr) != u'Unknown':
+                entry = helper.check_exists_book(authr, title)
+                if entry:
+                    book_html = flash(_(u"Uploaded book probably exists in the library, consider to change before upload new: ")
+                        + Markup(render_title_template('book_exists_flash.html', entry=entry)), category="warning")
+
             # check if file path exists, otherwise create it, copy file to calibre path and delete temp file
             if not os.path.exists(filepath):
                 try:
diff --git a/cps/helper.py b/cps/helper.py
index b45300c0..81addeb8 100644
--- a/cps/helper.py
+++ b/cps/helper.py
@@ -780,7 +780,17 @@ def get_download_link(book_id, book_format):
     else:
         abort(404)
 
+def check_exists_book(authr,title):
+    db.session.connection().connection.connection.create_function("lower", 1, lcase)
+    q = list()
+    authorterms = re.split(r'\s*&\s*', authr)
+    for authorterm in authorterms:
+        q.append(db.Books.authors.any(func.lower(db.Authors.name).ilike("%" + authorterm + "%")))
 
+    return db.session.query(db.Books).filter(
+        and_(db.Books.authors.any(and_(*q)),
+            func.lower(db.Books.title).ilike("%" + title + "%")
+            )).first()
 
 ############### Database Helper functions
 
diff --git a/cps/templates/layout.html b/cps/templates/layout.html
index 72eba890..9ffb04f8 100644
--- a/cps/templates/layout.html
+++ b/cps/templates/layout.html
@@ -99,6 +99,11 @@
         <div id="flash_info" class="alert alert-info">{{ message[1] }}</div>
       </div>
       {%endif%}
+      {%if message[0] == "warning" %}
+      <div class="row-fluid text-center" style="margin-top: -20px;">
+        <div id="flash_warning" class="alert alert-warning">{{ message[1] }}</div>
+      </div>
+      {%endif%}
       {%if message[0] == "success" %}
       <div class="row-fluid text-center" style="margin-top: -20px;">
         <div id="flash_success" class="alert alert-success">{{ message[1] }}</div>