diff --git a/FORCE_DIRECTED_GRAPH.md b/FORCE_DIRECTED_GRAPH.md
new file mode 100644
index 0000000..e69de29
diff --git a/README.md b/README.md
index 8833aca..1192692 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,5 @@
 1. [D3](/D3.md)
 1. [BUILD](/BUILD.md)
 1. [Lab](/Lab.md)
+1. [PIE](/PIE.md)
+1. [Force Directed Graphs](/FORCE_DIRECTED_GRAPH.md)
diff --git a/SUMMARY.md b/SUMMARY.md
index faf78c5..77f6ba0 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -4,3 +4,5 @@
 * [D3](/D3.md)
 * [BUILD](/BUILD.md)
 * [Lab](/Lab.md)
+* [PIE](/PIE.md)
+* [Force Directed Graphs](/FORCE_DIRECTED_GRAPH.md)