diff --git a/book/SUMMARY.md b/book/SUMMARY.md
index cd4b0443e8..2ee951f47c 100644
--- a/book/SUMMARY.md
+++ b/book/SUMMARY.md
@@ -1,24 +1,25 @@
 # Summary
 
- - [Intro](README.md)
- - [Opening a window](tuto-01-getting-started.md)
- - [Drawing a triangle](tuto-02-triangle.md)
- - [Uniforms](tuto-03-animated-triangle.md)
- - [Matrices](tuto-04-matrices.md)
- - [Adding colors](tuto-05-colors.md)
- - [Adding a texture](tuto-06-texture.md)
- - [A more complex shape](tuto-07-shape.md)
- - [Gouraud shading](tuto-08-gouraud.md)
- - [Depth testing](tuto-09-depth.md)
- - [Adjusting the perspective](tuto-10-perspective.md)
- - [Backface culling](tuto-11-backface-culling.md)
- - [The camera and summary of the vertex processing stages](tuto-12-camera.md)
- - [Blinn-phong shading](tuto-13-phong.md)
- - [Normal mapping](tuto-14-wall.md)
- - [Parallax mapping]()
- - [Deferred shading]()
- - [Shadow mapping]()
- - [Antialiasing]()
- - [Drawing lots of objects with instancing]()
- - [Performances](perf-intro.md)
- - [Synchronization](perf-sync.md)
\ No newline at end of file
+[Intro](README.md)
+
+- [Opening a window](tuto-01-getting-started.md)
+- [Drawing a triangle](tuto-02-triangle.md)
+- [Uniforms](tuto-03-animated-triangle.md)
+- [Matrices](tuto-04-matrices.md)
+- [Adding colors](tuto-05-colors.md)
+- [Adding a texture](tuto-06-texture.md)
+- [A more complex shape](tuto-07-shape.md)
+- [Gouraud shading](tuto-08-gouraud.md)
+- [Depth testing](tuto-09-depth.md)
+- [Adjusting the perspective](tuto-10-perspective.md)
+- [Backface culling](tuto-11-backface-culling.md)
+- [The camera and summary of the vertex processing stages](tuto-12-camera.md)
+- [Blinn-phong shading](tuto-13-phong.md)
+- [Normal mapping](tuto-14-wall.md)
+- [Parallax mapping]()
+- [Deferred shading]()
+- [Shadow mapping]()
+- [Antialiasing]()
+- [Drawing lots of objects with instancing]()
+- [Performances](perf-intro.md)
+- [Synchronization](perf-sync.md)