diff --git a/pdf/build_book.bat b/pdf/build_book.bat
index adeb0f3..f07e28d 100644
--- a/pdf/build_book.bat
+++ b/pdf/build_book.bat
@@ -2,7 +2,7 @@ python merge_book.py
 
 ipython nbconvert --to latex --template book6x9 book.ipynb
 ipython to_pdf.py
-move /Y book.pdf ../book6x9.pdf
+move /Y book.pdf ../Kalman_and_Bayesian_Filters_in_Python6x9.pdf
 
 ipython nbconvert --to latex --template book book.ipynb
 ipython to_pdf.py