How about this:
After the Guardian of Pluto dies, his ten-year-old son Doras inherits the throne and the power to generate ice beams. But no matter how hard he tries, he isn't able to shoot any beams. If that wasn’t enough, the Guardian of Jupiter sends a notice that Pluto will no longer remain a planet of the solar system, unless Doras can demonstrate his power.
Doras flies to Saturn to seek help from Queen Nyla, the Guardian of Saturn and his best friend. Unfortunately, he finds himself in the middle of a war when Jupiter attacks Saturn. With her power of lightning, Nyla is close to defeating the Guardian of Jupiter.
Enter Doras. He runs to Nyla to congratulate her and accidentally shoots his first ice beam at her, freezing her in an ice hill. The Guardian of Jupiter seizes the opportunity and punches a frozen Nyla, rendering her unconscious. Eventually the Guardian of Jupiter takes over Saturn and Pluto.
The other planets sign a Peace Treaty, but Doras refuses to comply. His quest to free Nyla leads him to the dead planet of Mars, while a search for new allies sends him to the unknown planets that lie closer to the Sun.
JUPITER'S AMBITION is a Middle Grade, Space Fantasy Novel complete at around 85k words. The first three chapters...