diff --git a/src/main/java/seedu/bookbuddy/BookBuddy.java b/src/main/java/seedu/bookbuddy/BookBuddy.java
index 96e979602b..4208124464 100644
--- a/src/main/java/seedu/bookbuddy/BookBuddy.java
+++ b/src/main/java/seedu/bookbuddy/BookBuddy.java
@@ -1,5 +1,6 @@
 package seedu.bookbuddy;
 
+import exceptions.InvalidCommandArgumentException;
 import exceptions.UnsupportedCommandException;
 import java.util.Scanner;
 import java.util.logging.Logger;
@@ -40,6 +41,8 @@ public static void getUserInput(BookList books) {
             } catch (UnsupportedCommandException e) {
                 LOGGER.log(Level.WARNING, "Unsupported command: {0}", userInput);
                 System.out.println(e.getMessage());
+            } catch (InvalidCommandArgumentException e) {
+                System.out.println(e.getMessage());
             }
         }
     }
diff --git a/src/main/java/seedu/bookbuddy/Parser.java b/src/main/java/seedu/bookbuddy/Parser.java
index b19736da8f..84a72b538e 100644
--- a/src/main/java/seedu/bookbuddy/Parser.java
+++ b/src/main/java/seedu/bookbuddy/Parser.java
@@ -64,8 +64,10 @@ public static void parseCommand( String input, BookList books) {
                 System.exit(0);
                 break;
             default:
+
                 LOGGER.log(Level.WARNING, "Sorry but that is not a valid command. Please try again", command);
                 throw new UnsupportedCommandException("Sorry but that is not a valid command. Please try again");
+
             }
         } catch (NumberFormatException e) {
             throw new InvalidBookIndexException("Book index must be an integer.");
diff --git a/src/main/java/seedu/bookbuddy/Ui.java b/src/main/java/seedu/bookbuddy/Ui.java
index ac324d0439..085aa6d638 100644
--- a/src/main/java/seedu/bookbuddy/Ui.java
+++ b/src/main/java/seedu/bookbuddy/Ui.java
@@ -38,8 +38,12 @@ public static void removeBookMessage(int index) {
         System.out.println("alright.. i've removed " + BookList.books.get(index).getTitle() + " from the list.");
     }
     public static void helpMessage() {
+        System.out.println("Here's a list of commands to get you started!!");
         System.out.println("add (Bookname) -> to add new books to the list");
         System.out.println("list -> to show whole list of added books");
         System.out.println("remove (index) -> to remove the book from the corresponding index");
+        System.out.println("mark (index) -> to mark book as read [R]");
+        System.out.println("unmark (index) -> to unmark book as unread [U]");
+        System.out.println("bye -> to exit BookBuddy software");
     }
 }