There are 5 books in the Twelve Houses series. The newest book is Fortune and Fate which came out in 2008.

1
Mystic and Rider

Book cover of Mystic and Rider
Gillengaria seethes with unrest. In the south, hostility toward magic and its users has risen to a dangerous level, though King Baryn has ordered that such mystics are to be tolerated. It is whispered that he issued the decree because his new wife used her magic powers to ensnare him……
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2
The Thirteenth House

Book cover of The Thirteenth House
In a second novel set in the troubled land of Gillengaria, the shiftling Kirra returns home from a mission to rescue the kidnapped Romar Brendan to find that her half-sister Casserah has been named heir and falls in love with the married Lord Romar, a tempestuous affair that places them…

3
Dark Moon Defender

Book cover of Dark Moon Defender
The King's Rider Justin has been dispatched to watch any suspicious activity at the convent that houses the fanatical Daughters of the Pale Mother. Worshippers of the moon goddess, they believe that all magic-wielding mystics are evil. Yet, in their midst, a young novice named Ellynor possesses the gift of…

4
Reader and Raelynx

Book cover of Reader and Raelynx
In this novel of secret sorceries and forbidden desires, the mystic Cammon must put aside his personal feelings for Princess Amalie while he reads the souls of her suitors for any potential threats. But Cammon is unable to read Amalie, and he begins to suspect that she herself possesses magic…

5
Fortune and Fate

Book cover of Fortune and Fate

For the Rider Wen, peace in Gillengaria has only brought despair. Plagued by guilt for failing to protect her king, Wen has fled the royal city and given herself the penance of a life of wandering, helping strangers in need, making sure they remain that: just strangers.

Until the day…