The empire's ghost / Isabelle Steiger.

"The empire of Elesthene once spanned a continent, but its rise heralded the death of magic. It tore itself apart from within, leaving behind a patchwork of kingdoms struggling to rebuild. But when a new dictator, the ambitious and enigmatic Imperator Elgar, seizes power in the old capital and seeks to recreate the lost empire anew, the other kingdoms have little hope of stopping him. Prince Kelken of Reglay finds himself at odds with his father at his country's darkest hour; the marquise of Esthrades is unmatched in politics and strategy, but she sits at a staggering military disadvantage. And Issamira, the most powerful of the free countries, has shut itself off from the conflict, thrown into confusion by the disappearance of its crown prince and the ensuing struggle for succession. Everything seems aligned in Elgar's favor, but when he presses a band of insignificant but skilled alley-dwellers into his service for a mission of greatest secrecy, they find an unexpected opportunity to alter the balance of power in the war. Through their actions and those of the remaining royals, they may uncover not just a way to defeat Elgar, but also a deeper truth about their world's lost history"--