Xenocide. Orson Scott Card. 2011.

In Xenocide, the third book of the Ender’s Game series, the planet Lusitania faces annihilation as the Starwaus Congress sends a fleet armed with the deadly ‘Molecular Disruption Device’ to destroy it. The planet is home to the alien species Pequeninos, the sentient insect Hive Queen, and humans - including Ender Wiggin and his family - and the planet’s inhabitants must race to find solutions to this existential threat. Meanwhile, the genetically engineered inhabitants of the planet Path grapple with their religious devotion and mental conditioning as they uncover the secrets of their oppression. As the Lusitanians work to neutralise the Descolada virus - vital to the planet’s ecosystem but deadly to humans - they also uncover the nature of faster-than-light travel using the mysterious force known as the ‘Outside’. Through this discovery, they transport  the endangered species and themselves to safety, thwarting the Congress’s fleet and preserving their world.