Shell Programming (Creating Menu and directing it to menu itself)

# ***** Code Starts here *****

until [ "$verify" = n ]
do
echo "1) Add new book"
echo "2) Remove existing book info"
echo "3) Update book info and quantity"
echo "4) Search for book by title/author"
echo "5) Process a book sold"
echo "6) Inventory summary report"
echo "7) Quit"
echo "select a menu"
read pattern
case $pattern in
1)
   echo "******Add new book*********"
   echo "Enter book name to create a new book"
   read bookname
   touch $bookname
   ;;
2)
  echo "******Remove existing book info*********"
  echo "Enter book name to remove the info"
  read bookname
  echo "" | cat>$bookname
   ;;
3)
  echo "******Update book info and quantity*********"
  echo "Enter book name to update the info"
  read bookname
  echo "enter text(title/author)" 
  read text
  echo $text | cat>>$bookname
   ;;
4)echo "******Search for book by title/author*********"
  echo "Enter title/author to search a book"
  read title
  echo "See the below list of files(books) having the entered title/author"
  find . -exec grep "$title" '{}' \; -print
  echo $text | cat>>$bookname
   ;;
6)
  echo "******Inventory summary report*********"
  echo "Enter book name to view the Inventory summary report"
  read bookname
  cat $bookname 
   ;;
7)
  exit case
  ;;
esac;
echo "Do u want to continue(Y/N)"
read verify
done

# ***** code ends here *****