Company of Slayers (The Company of Slayers Book 1) by Justin Waine

Money and Blood For over a thousand years the Nerlinean Ocean has been the fulcrum of the world. The battleground for waring empires, conflicting religions and avaricious merchant companies. On a ship in chains are five slaves, a small group among the many that are traded across the waters every day. These five are not like the others for they are resolved to escape. Kyrian the champion wrestler and his sister Dryana a priestess of the Great Goddess. Balinor a slave since birth but with the instincts of a warrior. Slinker the last war mage of the Tancree. Saliana a singer of songs and a teller of tales. Their escape will begin a journey from servitude to wealth and power, but the group have secrets, some so terrifying they will shape the fate of kingdoms.