The John Bellairs Booklist - http://www.bellairsia.com

STARRING LEWIS BARNAVELT AND ROSE RITA 
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    * The House with a Clock in Its Walls       (1973)
    * The Figure in the Shadows                 (1975)
    * The Letter, the Witch, and the Ring       (1976)
    
    * The Ghost in the Mirror                   (1993)
    * The Vengeance of the Witch-Finder         (1993)
    * The Doom of the Haunted Opera             (1995)

    * The Specter from the Magician's Museum    (1998)
    * 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)


STARRING ANTHONY MONDAY AND MISS EELLS
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    * The Treasure of Alpheus Winterborn        (1978)
    * The Dark Secret of Weatherend             (1984)
    * The Lamp from the Warlock's Tomb          (1988)
    * The Mansion in the Mist                   (1992)


STARRING JOHHNY DIXON AND PROFESSOR CHILDERMASS
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    * The Curse of the Blue Figurine            (1983)
    * The Mummy, the Will, and the Crypt        (1983)
    * The Spell of the Sorcerer's Skull         (1984)
    * The Revenge of the Wizard's Ghost         (1985)
    * The Eyes of the Killer Robot              (1986)
    * The Trolley to Yesterday                  (1989)
    * The Chessmen of Doom                      (1989)
    * The Secret of the Underground Room        (1990)

    * The Drum, the Doll, and the Zombie        (1994)

    * The Hand of the Necromancer               (1996)
    * The Bell, the Book, and the Spellbinder   (1997)
    * The Wrath of the Grinning Ghost           (1999)


STARRING PROSPERO AND ROGER BACON
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    * The Face in the Frost                     (1969)


OTHER TITLES
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    * Saint Fidgeta and Other Parodies          (1966)
    * The Pedant and the Shuffly                (1968)