Achaia is a Polish fantasy series of novels written by Andrzej Ziemiański, published in three volumes in 2002, 2003 and 2004 by the Fabryka Słów.

While most noble families manage to get their daughters out of this ordeal by temporary adopting some boys from lesser nobility, Archentar is manipulated by his young wife to actually send the princess off to the training.

Upon Archentar's diplomatic visit in Luan, the girl is tortured beneath his window so that the man could hear her screams before the negotiations over lands.

Against all odds, she manages to succeed and starts her journey which will make her take on many different roles: a prostitute, a farmer girl and finally, a soldier instrumental in a war that will change the shape of the whole continent.

A wizard Meredith is visited by one of the gods, who tells him to slay the leader of The Order, a powerful religious organization that oversees this world.

When the two men start talking, Sirius tells Zaan how as a child he was captured by pirates and made into a slave.

He recounts that among other slaves on the ship, there was another boy his age - a long missing son of Great Duke Orion whose fate remained a mystery for years and was only known by Sirius.