diff --git a/eBook/12.2.md b/eBook/12.2.md
index 54321c1..35f8d2a 100644
--- a/eBook/12.2.md
+++ b/eBook/12.2.md
@@ -189,6 +189,7 @@ func main() {
 			err)
 		os.Exit(1)
 	}
+	defer fi.Close()
 	fz, err := gzip.NewReader(fi)
 	if err != nil {
 		r = bufio.NewReader(fi)
diff --git a/eBook/13.3.md b/eBook/13.3.md
index bbe774d..642588d 100644
--- a/eBook/13.3.md
+++ b/eBook/13.3.md
@@ -14,7 +14,7 @@ func protect(g func()) {
 		log.Println("done")
 		// Println executes normally even if there is a panic
 		if err := recover(); err != nil {
-		log.Printf("run time panic: %v", err)
+			log.Printf("run time panic: %v", err)
 		}
 	}()
 	log.Println("start")
diff --git a/eBook/14.2.md b/eBook/14.2.md
index 91f4c3a..ce06731 100644
--- a/eBook/14.2.md
+++ b/eBook/14.2.md
@@ -557,7 +557,7 @@ go processChannel(sendChan, receiveChan)
 func processChannel(in <-chan int, out chan<- string) {
 	for inValue := range in {
 		result := ... /// processing inValue
-	out <- result
+		out <- result
 	}
 }
 ```