The Thieves of Nottica - The Chronicles of Omicron

Omicron is a planet where the humans are the invading aliens. Rigg is a native of Omicron, a shape-shifter and the youngest member of the Keymasters, a band of professional thieves who use their skills to defy an overbearing government known as the Hand. When the Keymasters find themselves on the run after a failed job, they must battle their way through mechanical monsters, airships, politics .