The Swarm is a 2016 science fiction novel by American writers Orson Scott Card and Aaron Johnston, and the first book of the Second Formic Wars trilogy of novels in the Ender's Game series.

[1] The first invasion of Earth was beaten back by a coalition of corporate and international military forces, and the Chinese army, but China has been devastated by the Formics' initial efforts to eradicate Earth life forms and prepare the ground for their own settlement.

Earth's government has been reorganized for defense; it now comprises a Hegemon, a planetary official responsible for keeping all the formerly warring nations in line, and a Polemarch, responsible for organizing all the military forces of the planet into the new International Fleet.

But ambition and politics, greed and self-interest remain, as important members of the military continue to place their career prospects ahead of Earth's defense.

It is up to Bingwen, Mazer Rackam, Victor Delgado and Lem Jukes to create a weapon that can effectively defend humanity.