The Dragonstar Chronicles 4

Sofi and her rapidly growing dragon have been taken to an enormous agricultural satellite above the distant world of Gardennia. The kidnappers seem friendly and the imprisonment benign, but just below a tranquil veneer is a vast political turbulence threatening to erupt.

SenExecA Tremendous VI want his cargo-dragon back, and there's no safe planet anywhere that can resist the invincible might and ambition of the Galactic Transportation Authority. It's only a matter of time...