Raven Stratagem

When the hexarchate's gifted young captain Kel Cheris summoned the ghost of the long-dead General Shuos Jedao to help her put down a rebellion, she didn't reckon on his breaking free of centuries of imprisonment - and possessing her. Even worse, the enemy Hafn are invading, and Jedao takes over General Kel Khiruev's fleet, which was tasked with stopping them. Only one of Khiruev's subordinates, Li...