diff --git a/main.py b/main.py
new file mode 100644
index 0000000..cf76a8b
--- /dev/null
+++ b/main.py
@@ -0,0 +1,55 @@
+import datetime
+from PyQt5.QtCore import QObject, pyqtSignal
+from calibre.gui2.actions import InterfaceAction
+from calibre.gui2 import error_dialog
+from calibre.utils.date import format_date
+
+# This class will emit a signal when the viewer is launched
+class ViewerMonitor(QObject):
+    viewer_launched = pyqtSignal(list)
+
+# The plugin class that will do the work
+class AutoDatestampAndView(InterfaceAction):
+    name = 'Auto Datestamp and View'
+    action_spec = ('Date and view book', None, 'View selected book and record date', None)
+    action_type = 'current'
+
+    def genesis(self):
+        # Create an instance of our monitor
+        self.monitor = ViewerMonitor()
+        self.monitor.viewer_launched.connect(self.datestamp_book)
+
+        # Hook into the View action's functionality
+        orig_view_func = self.gui.iactions['View']._view_calibre_books
+        
+        def new_view_func(book_ids):
+            # Call the original view function
+            orig_view_func(book_ids)
+            # Emit our custom signal
+            self.monitor.viewer_launched.emit(book_ids)
+            
+        # Replace the original view function with our new, hooked function
+        self.gui.iactions['View']._view_calibre_books = new_view_func
+
+    def datestamp_book(self, book_ids):
+        if not book_ids:
+            return
+
+        db = self.gui.library_view.model().db
+        date_column = '#lastopened'
+
+        if date_column not in db.custom_field_keys():
+            return error_dialog(self.gui, 'Before running this plugin',
+                                'You need to create a custom Date column with the lookup name "%s".' % date_column,
+                                show=True)
+
+        label = db.field_metadata.key_to_label(date_column)
+
+        # Update the date for each selected book
+        for book_id in book_ids:
+            now = datetime.datetime.now()
+            db.set_custom(book_id, now, label=label, commit=False)
+        
+        # Commit changes to the database and refresh the view
+        db.commit()
+        self.gui.library_view.model().refresh_ids(book_ids)