Olympian Order series: Into the Forge

Marcus is a young thief with a voice in his head. who had been raised by a witch. The voice helps him in his theft. He had been searching for the man he had only met once, his father. But after accepting his father was gone he gave up his old ways of theft.
But now his comrades have come back to ask for his help, and there might be a chance to finally find his father... But he must leave behind all the love he has now found......