The Dragonstar Chronicles: 3

Mister. Tremendous, emperor of the galaxy in everything but official title, wants his dragon back. His company, Interstellar Transport ("the largest Enterprise of Commerce in ITTC Known Space"), controls a galactic trade monopoly with a mysterious race of cosmic dragons that are able to eliminate the distances of space-time by a technique called VoidBore. He is determined to preserve that crucial monopoly. Unfortunately for Tremendous, his young hatchling has already imprint-bonded with an alien usurper, and the infant dragon does indeed regard Sofi as his mother. To make Chomm's home-world, Gardenia, and are welcomed warmly. But Sofi is suspicious of their motives: she has already learned everybody wants a dragon.