1. To Skin a Wolf (Here Witchy Witchy: Book 4, Independently published, 2023)
  2. To Starve an Ember: A Novel (High Plains Wordsmith LLC, 2021)
  3. Tombstone Lode (Zebra, 1986)
  4. Torchlight (Full Circle Series: Book 2, WaterBrook Press, 2001)
  5. Torrent (River of Time Series: Book 3, David C. Cook, 2011)
  6. Toska (Dark World Saga,‎ Independently published, 2019)
  7. Tossed: A Snack-Sized Mystery Cruise, Jmars Ink, November 2023
  8. Touring Colorado Hot Springs (2nd Globe Pequot Press/FalconGuides, 2012)
  9. Trail Mix: Bite Sized, Mostly True Stories from the Wilderness, Featuring Those…
  10. Trails to the Top: 50 Colorado Front Range Mountain Hikes (co-authored with Sus…
  11. Transcendence of the Imminent (Mercer University Law Review, 1980)
  12. Treachery Town (Zebra, 1987)
  13. Treasure (Full Circle Series: Book 4, WaterBrook Press, 2001)
  14. Tremors of Doubt (Elk Lake Publishing, Inc., 2018)
  15. Tressed to Kill (writing as Lila Dare)(Berkley Prime Crime,2010)
  16. Trips on Twos: 15 Walking Tours of Colorado Springs (The Author, 1978)
  17. Trips on Twos: 15 Walking Tours of the Pikes Peak Region (L. & K. Bergstrom, 19…
  18. Trips on Wheels: 15 Driving Tours from the Front Range (Graphic Services, 1985)
  19. Trouble on the Tracks (Ruby and Maude Adventure)(Filter Press, 2014)
  20. Trouble Returns (Ruby and Maude Adventure)(Filter Press, 2016)
  21. True Blue Los Angeles Baseball: Sports Timeline of the Los Angeles Dodgers (201…
  22. Trust in Me
  23. Truth Lies Six Foot Under: A True Cold-Case Mystery (Blue Harmony Press, 2013)
  24. Try Me (Demon Underground series #2)(Bell Bridge Books, 2010)
  25. Tucked Away (Hearts of Montana series, bk.1)(Entagled, 2015)
  26. Tunguska Event (Matterhorn the Brave Series #7)
  27. Twice Upon a Name: Tales of Mix-ups and Mistaken Identities (Bronzewood Books, …
  28. Twice Upon a Story: Triptych of Two Worlds (Kindle Direct Publishing, March 202…
  29. Twinkle, Twinkle Little Girl (Mother's House Pub., 2005)
  30. Twisted Roots: A Light Into the Darkness (Tate Publishing, 2012)
  31. Twisted Roots: Legacy (Tate Publishing, 2016)
  32. Twisted Roots: The Lost Scrolls (Tate Publishing, 2014)
  33. Two Decades of Digital Photography: My Favorite Images and How They Were Made (…
  34. Two Tickets to a Christmas Ball (Waterbrook, 2010)
  35. UFO on the Rez (The Lighthouse Company Series #1)(Pangea Press)
  36. Unapologetic: An Entrepreneur’s Journey from Pain to Pride (Perfect Publishing,…
  37. Unbroken Spirit (Mystic Hope series, bk.1)(Mountain Brook Ink, 2016)
  38. Uncommon Origins (Fighting Monkey Press, 2016)
  39. Under Pressure (Signet/New American Library, 2006)
  40. Undeserved Consequences (Filter Press, 2018)
  41. Unexpected: 11 Mysterious Stories (contributing author)(Scholastic, 2005)
  42. Unforgettable (Entangled Publishing, 2016)
  43. Unforsaken (Rhyolite Press, 2019)
  44. Unholy Blue [written as Darby Kaye] (Spence City, 2016)
  45. Universe of the Mantis: An Encyclopedia of the Mantis Saga (Independent, 2020)
  46. Unmaking Hunter Kennedy: A Love Story (Butterfly Books, 2012)
  47. Unraveling Glenmore (Kindle Direct Publishing, 2015)
  48. Unraveling Secrets
  49. Unstoppable (Coming April 2017)
  50. Until Dead: A Cold Case Suspense (Bell Bridge Books, 2022)