Preston W Child

Order of the Black Sun
   1. Ice Station Wolfenstein (2014)
   2. Deep Sea One (2014)
   3. Black Sun Rising (2014)
   4. The Quest for Valhalla (2015)
   5. Nazi Gold (2015)
   6. The Black Sun Conspiracy (2015)
   7. The Atlantis Scrolls (2015)
   8. The Library of Forbidden Books (2015)
   9. Tomb of Odin (2015)
   10. The Tesla Experiment (2016)
   11. The Seventh Secret (2016)
   12. The Medusa Stone (2016)
   13. Mystery of the Amber Room (2016)
   14. The Babylonian Mask (2016)
   15. The Fountain of Youth (2016)
   16. The Vault of Hercules (2016)
   17. Hunt for the Lost Treasure (2017)
   18. King Solomon's Diamonds (2017)
   19. The Lost Crown of the Knights Templar (2017) (with Tasha Danzig)
   20. The Inca Prophecy (2017) (with Tasha Danzig)
   21. Keepers of the Lost City (2017) (with Tasha Danzig)
     aka Guardians of the Lost City
   22. The Einstein Equation (2017) (with Tasha Danzig)
   23. The Hunt for Excalibur (2017) (with Tasha Danzig)
   24. Quest for the Holy Grail (2018)
   25. Project Phoenix (2019)
   26. The Book of Shadows (2019)
   27. Pirate Gold (2019)
   28. Secrets of the Deep (2019)
   29. The Templar Curse (2019)
   30. The Mayan Temple (2019)
   31. The Tomb of Genghis Khan (2019)
   32. Operation Rubicon (2019)
     aka The Sword of Julius Caesar
   33. Poseidon's Secret (2020)
   34. The Nostradamus Scrolls (2020)
   35. The Da Vinci Machine (2020)
   36. The Quest for the Seven Golden Cities (2020)
   37. The Crypt of Cleopatra (2020)
   38. The Skull of Blackbeard (2020)
   39. The Ripper Legacy (2021)
   40. The Lost Treasure of Thor (2021)
   41. The Hunt for Hitler's Secret Nazi Weapon (2021)
   42. Dinosaur Bones (2021)
   43. Mystery of the Ancient Sword (2022)
   44. The Key to Troy (2022)
   45. Mafia Gold (2022)
     aka The Stolen Riches of Al Capone
   46. The Casket of Napoleon (2022)
   47. The Roswell Treasure (2022)
   48. The Guardians of Lost Time (2023)
   49. Three Sacred Treasures (2023)
   50. The Tomb of Attila (2023)
   51. The Lost Crown of Robert the Bruce (2023)
   52. Guardians of the Lost Crusade (2023)
   53. The Ice Enigma (2024)

Relic Hunters (with Matthew King)
   1. The Hunt for the Holy Grail (2015)
   2. Operation Nexus One (2015)
   3. Seven Cities Of Gold (2015)

Olivia Newton
   1. The Hunt for the Holy Grail (2015) (with Matthew King)
   2. The Knights Templar Gold (2020)
     aka Gold of the Knights Templar
   3. The Inca Temple (2020)
   4. King Solomon's Tomb (2020)
   5. The Lazarus Effect (2020)
   6. The Chameleon Code (2021)
   7. Operation Storm Front (2021)
   8. Babel (2022)
   9. Osiris Rising (2022)
   10. The Malachi Circle (2022)

Artemis Team (with Fran Connor)
   1. Operation Hydra (2016)
   2. The Genesis Project (2016)
   3. The Alcazar Code (2017)

Louisiana Files (with Paul Hunter)
   1. Bones in the Bayou (2016)
   2. Mystery of the Swamp (2016)
   3. Louisiana Blues (2017)

Order of the Black Sun Boxset
   1. Order of the Black Sun Series: Books 1-3 (omnibus) (2019)
   2. Order of the Black Sun Series: Books 4-6 (omnibus) (2019)
   3. Order of the Black Sun Series: Books 7-9 (omnibus) (2019)
   4. Order of the Black Sun Series: Books 10-12 (omnibus) (2020)
   5. Order of the Black Sun Series: Books 13-15 (omnibus) (2020)
   6. Order of the Black Sun Series: Books 16-18 (omnibus) (2020)
   7. Order of the Black Sun Series: Books 19-21 (omnibus) (2020)
   8. Order of the Black Sun Series: Books 22-24 (omnibus) (2020)
   9. Order of the Black Sun Series: Books 25-27 (omnibus) (2020)
   10. Order of the Black Sun Series: Books 28-30 (omnibus) (2020)
   11. Order of the Black Sun Series: Books 31-33 (omnibus) (2020)

Last Templars
   1. The Lost Treasure of the Knights Templar (2020)
   2. Guardians of the Forbidden Library (2020)
   3. The Scrolls of Destiny (2020)
   4. The Hunt for the Book of Secrets (2020)
   5. Operation Buckingham (2021)
   6. Hunting the Dark Legion (2021)
   7. The Lost City of El Dorado (2021)
   8. The Secrets of the Seventh Arc (2022) (with Robert Conz)
   9. The Iron Vault Files (2023)
   10. The Edison Conundrum (2023)
   11. Sin City Secrets (2023)
   12. The Assassination Catalyst (2023)
   13. Operation Sleeper Cell (2023)
   14. Invisible War (2024)
   15. Experiment 41 (2024)
   16. Atomic Sun (2024)

Soul Collector
   1. The Soul Collector (2021)
   2. The Bones in the Pit (2021)
   3. The Body Double (2021)
   4. The Ghost Fields (2022)

Templar Legacy
   1. The Lost Library of the Knights Templar (2021)
   2. The Forgotten Tomb of the Knights Templar (2022)
   3. Mystery of the Knights Templar Castle (2022)
   4. The Knights Templar Code (2022)
   5. The Sacret Vault of the Knights Templar (2022)
   6. The Bermuda Triangle Mystery (2022)
   7. The Secret of Merlin's Bones (2023)
   8. The Treasure of the Voodoo Queen (2023)
   9. Shadows over New Orleans (2023)
   10. Guardians of the Abyss (2024)