Sasha: A Trial of Blood and Steel by Joel Shepherd is currently 99c at amazon (both in the US and Europe (though not the UK, Aus or NZ as far as I can tell).
Published originally by Pyr
This seems to have a large number of positive reviews
http://www.amazon.com/Sasha-Trial-Bl.../dp/B01BEOY8V2
http://www.amazon.de/Sasha-Trial-Blo.../dp/B01BEOY8V2
Spurning her royal heritage to be raised by the great warrior Kessligh, Sasha's exquisite swordplay astonishes all who see it. But she is young, untested in battle and often lead by her rash temper. In the complex world of Lenayin loyalties, her wilfulness is attracting the wrong kind of attention.
Lenin is a land divided by its beliefs: the Verenthane of the ruling class and the pagan Goeren-yai, amongst whom Sasha now lives. The Goeren-yai value swordplay and honour, and have come to see Sasha as the great spirit who will unite them. But Sasha is still searching for what she believes and must choose her side carefully.
Soon she will face her moment of testing. Is she ready to lead? Can she be the saviour the Goeren-yai want her to be?