In reading order
The World of the Gateway
EE Holmes
Whispers of the Walker
EE Holmes
Plague of the Shattered
EE Holmes
Awakening of the Seer
EE Holmes
Portraits of the Forsaken
EE Holmes
Heart of the Rebellion
EE Holmes
Soul of the Sentinel
EE Holmes
Gift of the Darkness
EE Holmes
Rise of the Coven
EE Holmes
City of the Forgotten
EE Holmes
Shadow of the Brotherhood
EE Holmes
Betrayal of the Sisterhood
EE Holmes