Norby and the Court Jester

This is the tenth book in the humorous science fiction series about an unusual robot named Norby and his human friend Jeff. Norby, Jeff, and General Yobo travel to the planet Izz to attend a festival and they discover a plot to overthrow the government. In addition, the Princess and her father are quarantined, Norby's robot friend has disappeared, and the entire popu;ation of the planet is mesmerized by a new computer game. Jeff and Norby have to solve the mystery.

Norby, Jeff and Admiral Yobo are off to attend the Izzian Toy and Game Fair. Before they even leave, Norby gets a telepathic call for help from his friend Pera, a small robot with emotive circuits and Norby's friend who lives on the planet Izz. Someone on Izz is doing little pranks, such as making the stock quotes incorrect and making the Holographic Television transmissions on the royal family twitch and sneer. This is destroying the economy on Izz. Who is making this mischief? Could it be Ing, now the Court Jester of Izz? Read the book to find out.