Books like The Ruins of Anthalas

An ancient holocaust holds the key to humanity's survival. Only a sliver of mankind survived the Xaros invasion. With Earth's defenses in ashes, nothing can stop the aliens' inevitable return. Hope arrives from a cryptic message from a long-lost alien race, promising the means to rebuild the shattered space fleet. Captain Valdar takes one of the last strike carriers, the "Breitenfeld," and his shell-shocked crew on a desperate mission to the dead world. Unfortunately, humans aren't the only power that received the ancient message... THE RUINS OF ANTHALAS is the second book in THE EMBER WAR SAGA, a military sci-fi space opera. If you like David Weber and John Ringo with a touch of Isaac Asimov, then you'll love this fast-paced and captivating adventure where humanity survives at the edge of a knife.