Cykl Petaybee Trylogia Petaybee Powers That Be (1993, razem z Elizabeth Ann Scarborough) Power Lines (1994, razem z Elizabeth Ann Scarborough) Power Play (1995, razem z Elizabeth Ann Scarborough)
Trylogia Twins of Petaybee Changelings (2005, razem z Elizabeth Ann Scarborough) Maelstrom (2006, razem z Elizabeth Ann Scarborough) Deluge (2007, razem z Elizabeth Ann Scarborough)
Cykl Barque Cats Catalyst (2010, razem z Elizabeth Ann Scarborough)
Pozostałe powieści Restoree (1967) Ring of Fear (1971) The Mark of Merlin (1971) The Kilternan Legacy (1975) The Coelura (1983) A Stitch in Snow (1985) The Year of the Lucy (1986) The Lady: A Tale of Ireland (Carradyne Touch, 1987) An Exchange of Gifts (1995) No One Noticed the Cat (1996) Black Horses for the King (1996) If Wishes Were Horses (1998) Nimisha’s Ship (1998)
Zbiory opowiadań Get Off the Unicorn (1973) Future Love: A Science Fiction Triad (1977, razem z Jeffreyem A Carverem i J.