Books like Legend of the Sword

Six months have passed since the destruction of the human colony on Keran by the alien Kreelan Empire. Earth and other human worlds band together to form the Confederation of Humanity to provide a mutual defense against the alien invaders. Unfortunately, not all human worlds want to join the Confederation. Some, like Saint Petersburg, would rather see it destroyed. With a powerful navy built in secret and armed with nuclear weapons, Saint Petersburg is preparing their own offensive against the Confederation when the Kreelans attack. Led by Tesh-Dar, an enigmatic Kreelan warrior priestess, the Kreelan Empire has begun its quest in earnest to find the One, an alien - a human - who might be able to lift the ages-old curse upon their race, a curse that will leave her species extinct in but a few more generations. But to find the One, they must bleed the humans in war...