diff --git a/00-hello_world/main b/00-hello_world/main
new file mode 100755
index 0000000..d443214
Binary files /dev/null and b/00-hello_world/main differ
diff --git a/00-hello_world/main.rs b/00-hello_world/main.rs
new file mode 100644
index 0000000..fbedd92
--- /dev/null
+++ b/00-hello_world/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
\ No newline at end of file
diff --git a/README.md b/README.md
index 562ca69..0143b92 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
 # rust-introduction
 
-Me learning Rust.
\ No newline at end of file
+Me learning Rust.
+
+[Interactive Book](https://rust-book.cs.brown.edu/)
\ No newline at end of file