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Publication Order of Standalone Novels
| Sinister Island | (1915) | Hardcover  Paperback  Kindle |
| House of Fear | (1916) | Hardcover  Paperback  Kindle |
| The Abandoned Room | (1917) | Hardcover  Paperback  Kindle |
| The Gray Mask | (1920) | Hardcover  Paperback  Kindle |
| The Guarded Heights | (1921) | Hardcover  Paperback  Kindle |
| The Hidden Road | (1922) | Hardcover  Paperback  Kindle |
Publication Order of Collections
Publication Order of Non-Fiction Books
| History of the 305th Field Artillery | (2015) | Hardcover  Paperback  Kindle |
| War’s Dark Frame | (2018) | Hardcover  Paperback  Kindle |