diff --git a/README.md b/README.md
index 04db704..b4e2a5c 100644
--- a/README.md
+++ b/README.md
@@ -103,4 +103,10 @@ In this chapter I made a special struct that saves the properties of the materia
Most metals however aren't purely reflective, they fuzz the reflection a little bit - so they are actually something inbetween a lambertian object and a mirror. Accounting for this gives the following neat image:
-
\ No newline at end of file
+
+
+### Chapter 9: Glass
+
+In this chapter glass and other dielectric materials have been implemented using Snell's law which describes refraction. The first attempt yields the following rendering:
+
+
\ No newline at end of file