diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index fbe7d91..47cc73a 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -31,7 +31,9 @@
     - [Controlling visibility with `pub`](ch07-02-controlling-visibility-with-pub.md)
     - [Importing names with `use`](ch07-03-importing-names-with-use.md)
 
-- [Basic Collections](ch09-01-basic-collections.md)
+- [Error Handling]()
+
+- [Essential Collections](ch09-01-essential-collections.md)
     - [Vectors](ch09-02-vectors.md)
     - [Strings](ch09-03-strings.md)
     - [`HashMap<K, V>`](ch09-04-hash-map.md)
diff --git a/src/ch09-01-basic-collections.md b/src/ch09-01-essential-collections.md
similarity index 97%
rename from src/ch09-01-basic-collections.md
rename to src/ch09-01-essential-collections.md
index 81f307a..896252a 100644
--- a/src/ch09-01-basic-collections.md
+++ b/src/ch09-01-essential-collections.md
@@ -1,4 +1,4 @@
-# Basic Collections
+# Essential Collections
 
 Rust's standard library includes a number of really useful data structures
 called 'collections'. Most types represent one specific value, but collections