diff --git a/appendixA/messycode/main.go b/appendixA/messycode/main.go
new file mode 100644
index 0000000..d2a0ca0
--- /dev/null
+++ b/appendixA/messycode/main.go
@@ -0,0 +1,11 @@
+package main
+
+func main() {
+data := struct {
+Message string `json:"message"`
+}{Message: "Hello world"}
+err := json.NewEncoder(os.Stdout).Encode(data)
+if err != nil {
+log.Fatalln(err)
+}
+}