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diff --git a/Chap17ProjAddingLogo.py b/Chap17ProjAddingLogo.py
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+#! python3
+
+# Chapter 17 Project Adding a Logo
+# Resizes all images in current directory to fit in a 300x300 square,
+# and adds a catlogo.png to the lower-right corner.
+
+import os
+from PIL import Image
+
+SQUARE_FIT_SIZE = 300
+LOGO_FILENAME = 'catlogo.png'
+
+logoIm = Image.open(LOGO_FILENAME)
+logoWidth, logoHeight = logoIm.size
+
+os.makedirs('withLogo', exist_ok=True)
+
+for filename in os.listdir('.'):
+    if not (filename.endswith('.png') or filename.endswith('.jpg')) \
+       or filename == LOGO_FILENAME:
+        continue
+    im = Image.open(filename)
+    width, height = im.size
+    if width > SQUARE_FIT_SIZE and height > SQUARE_FIT_SIZE:
+        if width > height:
+            height = int((SQUARE_FIT_SIZE / width) * height)
+            width = SQUARE_FIT_SIZE
+        else:
+            width = int((SQUARE_FIT_SIZE / height) * width)
+            height = SQUARE_FIT_SIZE
+        print('Resizing %s...' % (filename))
+        im = im.resize((width, height))
+
+        print('Adding logo to %s...' % (filename))
+        im.paste(logoIm, (width - logoWidth, height - logoHeight), logoIm)
+
+        im.save(os.path.join('withLogo', filename))