Earth is under attack by the alien Authority from the planet Haven. Cassius and his brother Jesse are the keys to defending Earth. But the enemy's new weapon sends the resistance into turmoil. Alliances shift, traitors are revealed, and soon Earth's last chance at salvation lies in the hands of one brother who must make the ultimate sacrifice. Two brothers battle for one planet's fate As the alien Authority's invasion begins, mankind stands on the brink of annihilation. Cassius Stevenson and his brother Jesse Fisher--descendants of the planet Haven's resistance forces--must forge alliances with the embittered factions on Earth to defend against the brutal attack. But the Authority has only begun to fight. When their terrible new weapon sends Earth's fragile coalition into turmoil, humanity's last chance at survival lies in the hands of the two brothers, whose fates are linked more closely than they ever imagined.

Praise for the previous books in the Skyship Academy series:"A fast-paced adventure that delivers solid action sequences throughout."--Publishers Weekly "Skyship Academy is the perfect book for teens that like science fiction."--SLJTeen "A definite must-read!"--James Dashner, New York Times bestselling author of The Maze Runner AGES: 12 to 18 AUTHOR: Inspired by the big drama and snappy dialogue of comic books and graphic novels by Brian K. Vaughan and Brian Michael Bendis, Nick James began writing at a young age. His love of fast-paced storytelling led to his action-packed science fiction series for young adults, Skyship Academy. James grew up in the small island town of Anacortes, Washington. He graduated from Western Washington University in 2006 and currently works as a substitute teacher in Bellingham.