Six of Ruin (Heirs of Irenwell #1)

A selfish princess, an eligible knight, a bitter bastard and a jaded wizard have to save the world, but they can barely handle their own petty problems. Princess Irina of Irenwell has everything she could wish for - a royal title, pretty jewellery and all the squires, servants and stable boys at her command. Or so it was before she discovered there's magic in her veins. Desperate to get rid of it, Irina has to travel to the distant north, to the very edge of the known world, with some unusual companions. Stepping out of the castle walls for the first time in her life, Irina just might realise there's more to life than what she imagined.