diff --git a/leech.py b/leech.py
index c0d2572..5f26ded 100644
--- a/leech.py
+++ b/leech.py
@@ -1,5 +1,6 @@
 #!/usr/bin/python
 
+import argparse
 import importlib
 import os
 
@@ -20,7 +21,7 @@ html_template = '''<?xml version="1.0" encoding="UTF-8" standalone="no"?>
 </html>
 '''
 
-def leech(url):
+def leech(url, filename=None):
     # we have: a page, which could be absolutely any part of a story, or not a story at all
     # check a bunch of things which are completely ff.n specific, to get text from it
     site = _get_site(url)
@@ -38,7 +39,9 @@ def leech(url):
     for i, chapter in enumerate(story['chapters']):
         html.append((chapter[0], 'chapter%d.html' % (i+1), html_template.format(title=chapter[0], text=chapter[1])))
 
-    epub.make_epub(story['title'] + '.epub', html, metadata)
+    filename = filename or story['title'] + '.epub'
+
+    epub.make_epub(filename, html, metadata)
 
 _sites = []
 
@@ -58,5 +61,10 @@ def _load_sites():
 
 if __name__ == '__main__':
     _load_sites()
-    leech('https://www.fanfiction.net/s/4109686/3/Taking-Sights')
+    parser = argparse.ArgumentParser()
+    parser.add_argument('url', help="url of a story to fetch")
+    parser.add_argument('--filename', help="output filename (the title is used if this isn't provided)")
+    args = parser.parse_args()
+
+    leech(args.url, filename=args.filename)
     pass