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4 books in series

Clockwork Empire

Clockwork Empire is a 4-book series with 4 primary works first released in 2011 with contributions by Steven Harper.

The Doomsday Vault
#1MostPopularFirstPublished
The Doomsday Vault
BySteven Harper

2011 • 3 Readers • 382 pages • 4

The Impossible Cube
#2
The Impossible Cube
BySteven Harper

2012 • 1 Reader • 369 pages

The Dragon Men
#3
The Dragon Men
BySteven Harper

2012 • 1 Reader • 365 pages

The Havoc Machine
#4
The Havoc Machine
BySteven Harper

2013 • 1 Reader • 379 pages