Whitechapel Gods by S. M. Peters.

Synopsis (from back of book):
In Victorian London, the Whitechapel section has been cut off, enclosed by an impassable wall, and is now ruled by two mysterious mechanical gods. Mama Engine is the goddess of sentiment, a mother to her believers. Grandfather Clock represents logic and precision.
A few years have passed since the Uprising, when humans fought the gold cloaks, the black cloaks, and even the vicious Boiler Men, the brutal police force responsible for keeping humans in check. Today, Whitechapel is a mechanized, steam-driven hell. But a few brave veterans of the Uprising have formed a new resistance, and they are gathering for another attack. For now they have a secret weapon that may finally free them...or kill them.
cost: $6.99 usd
I highly reccomend this book. it is a great, yet not too challenging read and there are many unpredictable plot twists and interesting characters. Be warned however, there are a good many gory, unsightly details in some parts. and an awesome steam-cannon...