Book 1
The Mediator #1: Shadowland
Meg Cabot
Book 2
The Mediator #2: Ninth Key
Meg Cabot
Book 3
The Mediator #3: Reunion
Meg Cabot
Book 4
The Mediator #4: Darkest Hour
Meg Cabot
Book 5
Mediator #5: Haunted
Meg Cabot
Book 6
The Mediator #6: Twilight
Meg Cabot
Book 7
The Mediator #7: Remembrance
Meg Cabot