Swarm

“Swarm” is the first book in the Star Force Series by B.V. Larson, and it’s a novel of military science fiction. The story begins with Earth being considered an ancient planet, but it soon finds itself in the middle of a war and on the brink of extinction due to an alien empire’s annexation. The protagonist, Kyle Riggs, is abducted by an alien spacecraft that tests all its Prisoners, executing those who fail.