diff --git a/audiobook_metadata/combine_audiobookmedia_to_m4b.py b/audiobook_metadata/combine_audiobookmedia_to_m4b.py
index 3dc632f..13af738 100755
--- a/audiobook_metadata/combine_audiobookmedia_to_m4b.py
+++ b/audiobook_metadata/combine_audiobookmedia_to_m4b.py
@@ -7,6 +7,7 @@ import subprocess
 import tempfile
 from pathlib import Path
 import time
+from typing import Any
 
 logfile=Path(f"media_{time.strftime("%Y%m%d_%H%M%S")}.log")
 
@@ -137,7 +138,7 @@ def create_m4b(root_path: Path, book_dir: Path) -> None:
         else:
             log_message(f"FAILED: Code: {result.returncode}, Stderr: {result.stderr}")
 
-def find_book_dirs(root: Path) -> list[Path]:
+def find_book_dirs(root: Path) -> tuple[list[Any], int]:
     """
     A book directory is any directory containing more than one
     audiobook file (.mp3, .m4a, .m4b)
@@ -152,13 +153,19 @@ def find_book_dirs(root: Path) -> list[Path]:
     counts: dict[Path, int] = {}
 
     for file in media_files:
+        if counts.get(file.parent, 0) > 1:
+            continue
         counts[file.parent] = counts.get(file.parent, 0) + 1
 
-    return sorted(
-        directory
-        for directory, count in counts.items()
-        if count > 1
-    )
+    directories = []
+    size = 0
+    for directory, count in counts.items():
+        if count > 1:
+            directories.append(directory)
+            size += sum(file.stat().st_size for pattern in ("*.mp3", "*.m4a", "*.m4b") for file in directory.glob(pattern))
+
+
+    return sorted(directories), size
 
 def main() -> None:
     parser = argparse.ArgumentParser()
@@ -180,7 +187,7 @@ def main() -> None:
         create_m4b(target.parent,target)
         return
 
-    book_dir_set = find_book_dirs(target)
+    book_dir_set, library_size = find_book_dirs(target)
 
     for book_dir in book_dir_set:
         log_message(f"Found Media: {book_dir}")
@@ -190,8 +197,11 @@ def main() -> None:
     if name != "y":
         log_message(f"Aborted")
         exit(0)
+    size = 0
     # Root folder containing many books
     for book_dir in book_dir_set:
+        size += sum(file.stat().st_size for pattern in ("*.mp3", "*.m4a", "*.m4b") for file in book_dir.glob(pattern))
+        print(f"{size / 1024**3:07.2f}/{library_size/ 1024**3:07.2f} - {size/library_size*100:.2f}% ... ",end="")
         try:
             create_m4b(target,book_dir)
         except Exception as exc: