1. The Riddle of the Wren (1984)
2. Moonheart (1984)
3. The Harp of the Grey Rose (1985)
4. Mulengro: A Romany Tale (1985)
5. Yarrow (1986)
6. Greenmantle (1988)
7. Wolf Moon (1988)
8. Svaha (1989)
9. The Valley of Thunder (Philip José Farmer's The Dungeon, Vol. 3, Dungeon series) (1989)
10. The Hidden City (Philip José Farmer's The Dungeon, Vol. 5) (1990)
11. Angel of Darkness (first published under the pseudonym Samuel M. Key) (1990)
12. The Little Country (1991)—1992 World Fantasy award nominee
13. Into The Green (1993)
14.The Wild Wood (Brian Froud's Faerielands, Illustrated by Brian Froud) (1994)
15 .Memory and Dream (1994)
16. The Road to Lisdoonvarna (2001)
17. The Mystery of Grace (2009)
18. Eyes Like Leaves (2009)
19. Under My Skin (2012)
Some additional young adult novels are listed under their series name below.
20. Little (Grrl) Lost (2007)
21. The Painted Boy (2010)
22. The Cats of Tanglewood Forest (2013)
23. Berlin (1989)
24.The Fair in Emain Macha (1990)
25.Our Lady of the Harbour (1991)—1992 World Fantasy award nominee
26. Paperjack (1992)—1993 World Fantasy award nominee
27.Death Leaves an Echo (part of three novella collection, Cafe Purgatoriam) (1991)
28. A Circle of Cats (illustrated by Charles Vess) (2003)—2004 World Fantasy award nominee
29. Promises to Keep (2007, Tachyon Publications)
30. Ghosts of Wind and Shadow (1991)
31. Refinerytown (2003)
32. This Moment (2005)
33. Make A Joyful Noise (2006)
34. Old Man Crow (2007)
35. Riding Shotgun (2007)
36. Yellow Dog (2008)
37. De Grijze Roos ("The Grey Rose") (1983)
38. Hedgework and Guessery (1991)
39. Spiritwalk (1992)
40. Dreams Underfoot (1993)
41. The Ivory and the Horn (1995)
42. Jack of Kinrowan (1995)
43. Moonlight and Vines (1999)
44. Triskell Tales (2000)
45. Waifs and Strays (2002)
46. Tapping the Dream Tree (2002)
47. A Handful of Coppers (Collected Early Stories, Vol.1: Heroic Fantasy) (2003)
48. Quicksilver & Shadow (Collected Early Stories, Vol.2) (2004)
49. The Hour Before Dawn (2005)
50. Triskell Tales 2 (2006)
51. What the Mouse Found (2008)
52. Woods and Waters Wild (2009)
53. Muse and Reverie (2009)
54. The Dreaming Place (young adult, illustrated by Brian Froud) (1990)
55. From a Whisper to a Scream (first published under the pseudonym Samuel M. Key) (1992)
56. I'll Be Watching You (first published under the pseudonym Samuel M. Key) (1994)
57. Trader (1997)—1998 World Fantasy award nominee
58. Someplace to Be Flying (1998)—1999 World Fantasy award nominee
59. Forests of the Heart (2000)—2000 Nebula award nominee
60.The Onion Girl (2001)—2002 World Fantasy award nominee
61. Seven Wild Sisters (novella illustrated by Charles Vess) (2002)—2003 World Fantasy award nominee
62. Spirits in the Wires (2003)
63.A Circle of Cats (2003) (written as a children's book)
64. Medicine Road (illustrated by Charles Vess, Tachyon Publications) (2004)
65.The Blue Girl (young adult) (2004)
66. Widdershins (2006)
67.Promises to Keep (2007, Tachyon Publications)
68. Old Man Crow (2007)
69. Dingo (young adult) (2008)