Omen The Stained Sea - Paul Williams - Bog

In the wake of a lost messiah, an oppressed religious sect known as 'the Singers of Oros' are targeted by those in power. A lone Singer calling himself Runo works tirelessly to revive the faith of his people by any means necessary. Even if it leads to bloody experiments, and cold-hearted manipulation.
A young slave named Cai is called on by a philosopher to aid in a catalogue of the wealthiest families in Grecuria, starting with the owner of the library where he works. On his journey he must confront a past that isn't his own.
Lastly, Sailing on a sky ship surrounded by merchants, Mele Amahki was given passage to begin a new life. However, everything changes when their pink sky turns blue, and they find themselves in a new, unexpected world where things are much the same as back home, except her people do not exist. She finds herself thrust into positions of power, entirely unsure of what is best for her crew.
Knowledge, religion, power, and blood run through the veins of the Grecurian islands. But through three headstrong individuals, the veins will be cut, and darkness will stain the sea.