This is really made up of two separate trilogies. The first three books are about Owen and is upbringing under Severn and eventually overthrowing him and placing the rightful ruler on the throne. The second trilogy is about Owen's daughter Trynne and her fight against evil wizards trying to destroy Kingfountain.
Fantasy series which follows a single character at a time. This is more of a political series where most of the time is spent trying to out-manuever others.