Thraxis has returned to Athraskani with his wife, Arrow. He seeks out his family and finds that he has a young sister, Thiacene who shares the same magical abilities as himself. Rather than risk their daughter being taken away, as was the case with Thraxis, his parents have told the Black Council that their daughter only has the skills of a red-robe and not the black-robe abilities that she truly possesses.

However, Thraxis's return brings the Black Council to his home and they quickly see through the deception surrounding his sister.

Soon Thraxis and his wife find themselves in the centre of a mission to discover the lost city of Xaqqara and to find the truth about the lost power of the ancient wizards. At the same time Thraxis battles to resist the attractions of the evil Melilandra, the wizard originally destined to be the mother of his child.

Heretic Sun is a worthy sequel to Tyrant Moon. Thraxis and Arrow return to his homeland and find that things are not quite as he remembers. Thraxis discovers the truth about his apparent abandonment by his parents and strives to ensure that his sister doesn't suffer the same fate. At the same time he still struggles to come to terms with his relationship with Arrow. Having been brought up to believe he would marry a fellow wizard to find that his heart's desire is a barbarian goes against everything he believes in.

The interplay between the devout members of the Black Council and Thraxis and Arrow makes the divide between the sides seem insurmountable. Thraxis has gone against everything they believe in and has destroyed their plans to breed a "super-wizard". As the younger recruits start to follow Thraxis and turn away from the traditional world of the Council the wizards feel their control diminishing.

This novel is a great read. It is compelling and enchanting, holding on to the reader until the very last word. Elaine Corvidae is a skilled author and well worth trying.

Synopsis
On a quest to discover a ruined city, Thraxis and Arrow must find their way through a maze of deceit and treachery to discover the truth behind its destruction...and behind the prophecy of an unborn child who will damn or save them all.