diff --git a/book-1/Main.tex b/book-1/Main.tex
index 4b183b9..c66d3ce 100644
--- a/book-1/Main.tex
+++ b/book-1/Main.tex
@@ -89,7 +89,6 @@ I'll need to go over it multiple times later anyway.}
 \input{6}
 \input{7}
 \input{8}
-\input{9}
 
 %===========================================================================================================================================
 \end{document}