diff --git a/README.md b/README.md
index f12f208..edc0156 100644
--- a/README.md
+++ b/README.md
@@ -16,3 +16,4 @@
 - [Transformers](./Chapters/12-Transformers/INDEX.md)
 - [Diffusion](./Chapters/13-Diffusion/INDEX.md)
 - [GNN GCN](./Chapters/14-GNN-GCN/INDEX.md)
+- [Appendix-A](./Chapters/15-Appendix-A/INDEX.md)