The Hand of the Necromancer (1996)
The Bell, the Book, and the Spellbinder (1997)
The Specter from the Magician's Museum (1998)
The Wrath of the Grinning Ghost (1999)
The Beast under the Wizard's Bridge (2000)
The Tower at the End of the World (2001)
The Whistle, the Grave, and the Ghost (2003)
The House Where Nobody Lived (2006)
The Sign of the Sinister Sorceror (2008)