Brother Wulf

The Spook's Apprentice: Book 1

Percy Jackson and the Lightning Thief (Book 1)

The Spook's Curse: Book 2

Percy Jackson and the Sea of Monsters (Book 2)

Spook's: A New Darkness

Percy Jackson and the Titan's Curse (Book 3)

Spook's: The Dark Army

The Spook's Mistake: Book 5

The Spook's Revenge: Book 13

The Lost Hero (Heroes of Olympus Book 1)

Spook's: Dark Assassin

The Spook's Battle: Book 4

Percy Jackson and the Olympians: Wrath of the Triple Goddess

The Spook's Sacrifice: Book 6

Spook's: Alice: Book 12