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Publication Order of Imperium Books
| Mech 1 | (2010) | Hardcover  Paperback  Kindle |
| Mech 2 | (2010) | Hardcover  Paperback  Kindle |
| Mech Zero | (2012) | Hardcover  Paperback  Kindle |
| Mech 3 | (2012) | Hardcover  Paperback  Kindle |
| Mech 4 | (2017) | Hardcover  Paperback  Kindle |
Chronological Order of Imperium Books
| Mech Zero | (2012) | Hardcover  Paperback  Kindle |
| Mech 1 | (2010) | Hardcover  Paperback  Kindle |
| Mech 2 | (2010) | Hardcover  Paperback  Kindle |
| Mech 3 | (2012) | Hardcover  Paperback  Kindle |
| Mech 4 | (2017) | Hardcover  Paperback  Kindle |