MYSTERY OF THE INVISIBLE PANDA Lisa Searches For A Disappearing Panda Reader For 5 to 8 Year Olds. FOLLOW THE MYSTERY OF THE INVISIBLE PANDA Lisa, a young pretty panda, is bored staying at her house. She started to look around and she found a book about a panda that became invisible. Lisa always wanted to be a detective and she decided to find the mysteries around this invisible panda. When she started asking the elderly pandas in her town if they had remembered this invisible panda, they all told her to stop looking that she would get in big trouble or be hurt, if she continued her quest.