Sebastien De Castell & Way of the Argosi
Sebastian De Castell was born in Montreal, Quebec, and has written 12 novels, including four in the Greatcoats Quartet, six in the Spellslinger series, and two in the Argosi series. He's also written short stories set in those worlds available on his website and in various magazines. Way of the Argosi is a YA fantasy, though it’s suitable for adults as well, and is the first book in a series.
A fun fact about Sebastien is that he used to make his living playing guitar and speaking in a fake British accent in a 1960s rock and roll tribute band.
You can find Sebastien via the below links.