Norby's Other Secret & Norby and the Lost Princess

In the second volume of the complete children''s sci-fi series, a boy and his robot venture to a dangerous planet and go in search of a missing princess.Norby''s Other SecretScheming scientists want to find the secrets behind Norby''s antigravity abilities, but they have to dismantle him to do it! To evade them, Norby and Jeff flee to the planet Jamya, where Norby was created. But can these friend...