diff --git a/16-particle-systems/README.md b/16-particle-systems/README.md
new file mode 100644
index 0000000..625058a
--- /dev/null
+++ b/16-particle-systems/README.md
@@ -0,0 +1,45 @@
+# Chapter 16: Particle Systems
+
+As I read this book, I summarize what I think is wrong. If you think my comments are wrong then please let me know. We can dicuss more and update your opinion.
+
+## Compute
+
+A metal shader file isn't included in the bundle so we can't read shader so the runtime error is happened. But a metal shader is compiled and saved as the default library. In Renderer.swift, in initializeMetal(), replace:
+
+```
+guard let device = MTLCreateSystemDefaultDevice(),
+      let commandQueue = device.makeCommandQueue(),
+      let path = Bundle.main.path(forResource: "Shaders", ofType:"metal")
+else { return nil }
+
+let pipelineState: MTLComputePipelineState
+do {
+  let input = try String(contentsOfFile: path, encoding: String.Encoding.utf8)
+  let library = try device.makeLibrary(source: input, options: nil)
+  guard let function = library.makeFunction(name: "compute")
+  else { return nil }
+  pipelineState = try device.makeComputePipelineState(function: function)
+} catch {
+  print(error.localizedDescription)
+  return nil
+}
+```
+
+With:
+
+```
+guard let device = MTLCreateSystemDefaultDevice(),
+      let commandQueue = device.makeCommandQueue()
+else { return nil }
+
+let pipelineState: MTLComputePipelineState
+do {
+  let library = device.makeDefaultLibrary()!
+  guard let function = library.makeFunction(name: "compute")
+  else { return nil }
+  pipelineState = try device.makeComputePipelineState(function: function)
+} catch {
+  print(error.localizedDescription)
+  return nil
+}
+```
diff --git a/README.md b/README.md
index d91eeaf..309012b 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,7 @@ You can see color images in this book at [here](https://www.raywenderlich.com/bo
  * [Chapter 13: Instancing & Procedural Generation](https://github.com/daemyung/metal-by-tutorials/tree/main/13-procedural-generation)
  * [Chapter 14: Multipass & Deferred Rendering](https://github.com/daemyung/metal-by-tutorials/tree/main/14-multipass-rendering)
  * [Chapter 15: GPU-Driven Rendering](https://github.com/daemyung/metal-by-tutorials/tree/main/15-gpu-driven-rendering)
+ * [Chapter 16: Particle Systems](https://github.com/daemyung/metal-by-tutorials/tree/main/16-particle-systems)
 
 ## Copyright