Galaxy patrol - Jean Ure

Jake is a sci-fi buff, so when he's abducted by aliens he's delighted.But when he realises that his younger sister has also been taken, he'snot so pleased. What do they want with her?They find themselves on a space ship manned by aliens from aconfederation of planets. They form part of a Galaxy Patrol team,ceaselessly patrolling the galaxy to check on alien incursions intoless advanced worlds, such as Earth. They recruit children as localagents to help them in their work. Children believe: adults don't. NowJake and Rosie's first mission is to rescue the Queen, who has beentaken over by an alien bug …