The Mummy, the Will, and the Crypt (Johnny Dixon Book 2)
The Revenge of the Wizard's Ghost (Johnny Dixon Book 4)
The Eyes of the Killer Robot (Johnny Dixon Book 5)
The Trolley to Yesterday (Johnny Dixon Book 6)
The Secret of the Underground Room (Johnny Dixon Book 8)
The Drum, the Doll, and the Zombie (Johnny Dixon Book 9)