diff --git a/README.md b/README.md
index 5e83533..306e4cf 100644
--- a/README.md
+++ b/README.md
@@ -274,6 +274,8 @@ At the moment this is not useful for anyone but myself, if at some point I find
           * [Kubernetes Up and Running](http://shop.oreilly.com/product/0636920043874.do#tab_04_2) 📕 💰
           * [Key Kubernetes Concepts](https://towardsdatascience.com/key-kubernetes-concepts-62939f4bc08e) 📰 🆓
           * [Programming Kubernetes](https://learning.oreilly.com/library/view/programming-kubernetes/9781492047094/) 📕 💰
+        * Service Mesh
+          * [Istio: Up & Running](https://learning.oreilly.com/library/view/istio-up-and/9781492043775/) 📕 💰
       * Provisioning
         * Terraform
           * [Introduction to Terraform](https://www.youtube.com/watch?v=h970ZBgKINg) 📼 🆓
diff --git a/resources/topic-graph.mmd b/resources/topic-graph.mmd
index 5fcbf95..56644d8 100644
--- a/resources/topic-graph.mmd
+++ b/resources/topic-graph.mmd
@@ -93,6 +93,8 @@ graph TD
         Orc --> K8S[Kubernetes]
         Orc --> Mesos
         Orc --> Nomad
+        Orc --> SerM[ServiceMesh]
+          SerM --> IsT[Istio]
     OPS --> NET[Networking]
       NET --> NETP[Protocols]
         NETP --> Socket
diff --git a/resources/topic-graph.png b/resources/topic-graph.png
index 89c71f5..c6b1373 100644
Binary files a/resources/topic-graph.png and b/resources/topic-graph.png differ