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Publication Order of Operation: Midnight Books
| Operation: Midnight Tango | (2005) | Hardcover  Paperback  Kindle |
| Operation: Midnight Escape | (2005) | Hardcover  Paperback  Kindle |
| Operation: Midnight Guardian | (2006) | Hardcover  Paperback  Kindle |
| Operation: Midnight Rendezvous | (2006) | Hardcover  Paperback  Kindle |
| Operation: Midnight Cowboy | (2007) | Hardcover  Paperback  Kindle |