Adventures in Hyperspace: Fire Ring Race

Fire Ring Race is a young readers book in the Adventures in Hyperspace series, written by Ryder Windham and illustrated by Robert Rath. It is centered on Han Solo and Chewbacca and set between the time when Solo acquired the Millennium Falcon and the events of Star Wars Episode IV: A New Hope.

Publisher's summary
Before they joined the Rebellion against the Empire, the pilot Han Solo and his co-pilot Chewbacca made their living by transporting cargo across the galaxy in the Millennium Falcon''. But when Jabba the Hutt hires them to pick up a cargo container at Fornax Station, Han and Chewie pick up something else ... trouble!''