1. Dangerous Snakes and Arachnids in Colorado (2019)
  2. Dangerous Turf (Black Opal Books, 2017)
  3. Dare Me (Demon Underground series #5)(Bell Bridge Books, 2013)
  4. Dark Blessing (Flashing Blades: Vol. 1, Prismatic Raven, 2022)
  5. Dark Brother: A Novel (CreateSpace, 2016)
  6. Dark of Night (Dr. Evan Wilding Series: Book 2, Thomas & Mercer, 2022)
  7. Dark Water Dive (Signet/New American Library, 2004)
  8. Dark Waters: A Thriller (Crooked Lane Books, 2015)
  9. Dark World: Genesis (The Alex and Jay Chronicles, Dark World Saga, Keen Quill P…
  10. Dark World: Oblivion (The Alex and Jay Chronicles, Dark World Saga, Keen Quill …
  11. Dark World: Revelations: (The Alex and Jay Chronicles, Dark World Saga, Keen Qu…
  12. Darken (The Siege Series: Book 1, Little Prince Publishing, 2016)
  13. Darkness of the Devourer, Relic of Time War Series Book 12 (2025)
  14. Darkwood Crossing: Bailey, The Critter Sitter (as Elle Vaughn)
  15. Daughters of War (CreateSpace, 2015)
  16. Dawn of Liberty (Vision Writer Publications, 2016)
  17. Days of Decision: An Oral History of Conscientious Objectors in the Military du…
  18. Dead and Gondola: A Christie Bookshop Mystery (as Ann Claire, Bantam, 2022)
  19. Dead Man Limping: An Axel Hatchett Mystery (#1)(Blood and Thunder Press, 2014)
  20. Dead Man Waltzing (writing as Ella Barrick)(NAL/Obsidian, 2012)
  21. Dead Man's Badge (Zebra, 1991)
  22. Dead Stop (Sydney Parnell Series: Book 2, Thomas & Mercer, 2017)
  23. Dead Time (Between Two Evils #3)(Rocky Mt. Press, 2017)
  24. Deadfall: A John Hutchinson Novel (Thomas Nelson, 2007)
  25. Deadlock: A John Hutchinson Novel (Thomas Nelson, 2009)
  26. Deadly Bones (Create Space, 2012)
  27. Deadly Currents (Midnight Ink, 2011)
  28. Deadly Currents (Speaking Volumes, 2020)
  29. Deadly Secrets (Create Space, 2011)
  30. Dear Dr. Sillybear (Henry Holt, 1997)
  31. Death & Deception [novella] (in Sally Port Magazine, JAN 2025)
  32. Death in the Dolomites (Poisoned Pen Press, 2014)
  33. Death in Trout Fork (Black Opal Books, 2018)
  34. Death of a Christmas Tree Salesman (Games Afoot, LLC, 2023)
  35. Death on the Horizon (Children of the Apocalypse: Book 2, Blood and Ink Press, …
  36. Death Tolls (Ace paperback, 1987)
  37. Deathly Magic (Here Witchy Witchy: Book 2, Independently published, 2023)
  38. Debra’s Bandit (Revolving Point, Texas Series: Book 3, 2012)
  39. Deceptive Baritone (Benson Town Rock Bank series, bk. 1)(Independently publishe…
  40. Deceptive Promises (Barbour, 2008)
  41. Deep Harbor (The Northern Lights Series: Book 2, WaterBrook Press, 1999)
  42. Deep Quarry (Ace paperback, 1989)
  43. Deep Venture: A Sailor’s Story of Cold War Submarines (Pelican, November 2011)
  44. Defiance (The King's Game: Book 4, Blood & Ink Press, 2019)
  45. Del Toro Moon (Owl Hollow Press, 2018)
  46. Della Raye: A Girl Who Grew Up in Hell and Emerged Whole (Pelican Publishing, 2…
  47. Deluge (River of Time Series: Book 5, Bergren Creative Group, Inc., 2014)
  48. Designing the Perfect Resume (Barron's Educational Series)
  49. Detection Dogs on the Job (The Child's World, 2017)
  50. Detours of the Soul: How to Avoid Yourself (Ambient Light, 2015)