diff --git a/watcher.py b/watcher.py
index d991e6b..f9eabc1 100644
--- a/watcher.py
+++ b/watcher.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import os
 import subprocess
 import time
@@ -9,7 +10,7 @@ WATCH_DIR = "/data"  # Mount your host Books folder here
 class NewBookHandler(FileSystemEventHandler):
     def __init__(self):
         super().__init__()
-        self.seen_dirs = set()  # avoid processing the same dir multiple times
+        self.seen_dirs = set()  # Track processed directories
 
     def on_created(self, event):
         if event.is_directory:
@@ -20,29 +21,31 @@ class NewBookHandler(FileSystemEventHandler):
             self.process_new_dir(event.dest_path)
 
     def process_new_dir(self, path):
-        # avoid duplicate processing
+        # Avoid duplicate processing
         if path in self.seen_dirs:
             return
         self.seen_dirs.add(path)
 
-        # small delay to allow files to finish copying
+        # Short delay to allow files to finish copying
         time.sleep(2)
 
         try:
-            m4b_files = [
-                f for f in os.listdir(path)
-                if f.lower().endswith(".m4b") and not f.startswith("._")
-            ]
+            files = os.listdir(path)
         except FileNotFoundError:
-            return  # directory disappeared
+            return  # directory may have been removed
 
+        m4b_files = [f for f in files if f.lower().endswith(".m4b") and not f.startswith("._")]
         if not m4b_files:
-            print(f"⚠️ Skipping {path} (no .m4b files yet)")
+            print(f"⚠️ Skipping {path} (no .m4b files detected)")
             return
 
         book_name = os.path.basename(path)
         print(f"📕 New book detected: {book_name} at {path}")
+        print("Contains .m4b files:")
+        for f in m4b_files:
+            print("  ", f)
 
+        # Run your main.py script
         try:
             subprocess.run(
                 ["python3", "main.py", "-da", path],
@@ -59,6 +62,15 @@ if __name__ == "__main__":
     observer.start()
     print(f"👀 Watching for new book folders in {WATCH_DIR} ...")
 
+    # --- Startup scan: just print existing folders ---
+    for root, dirs, files in os.walk(WATCH_DIR):
+        m4b_files = [f for f in files if f.lower().endswith(".m4b") and not f.startswith("._")]
+        if m4b_files:
+            print(f"📁 Existing book folder detected (startup scan): {root}")
+            for f in m4b_files:
+                print("  ", f)
+            # Do NOT call process_new_dir -> prevents running main.py on existing files
+
     try:
         while True:
             time.sleep(1)