Threshold
Elizabeth Haydon
The Symphony of Ages (adult) (1)
The Thief Queen's Daughter
The Lost Journals of Ven Polypheme (young adult) (2)
Rhapsody: Child of Blood
The Rhapsody Trilogy (1)
Requiem for the Sun
The Middle Books (1)
Prophecy: Child of Earth
The Rhapsody Trilogy (2)
The Floating Island
The Lost Journals of Ven Polypheme (young adult) (1)
Elegy for a Lost Star
The Middle Books (2)
The Dragon's Lair
The Lost Journals of Ven Polypheme (young adult) (3)
Destiny: Child of the Sky
The Rhapsody Trilogy (3)
The Assassin King
The War of the Known World Trilogy (1)