From the back of the book:
The fourth moon of Yavin, site of the battle that destroyed the Death Star in Star Wars IV: A New Hope. Bespin's famed Cloud City, the floating paradise from The Empire Strikes Back. These names bring back exciting images from the greatest space fantasy films of all time!
And we've captured that excitement in this definitive guidebook to two of the most important systems in the Star Wars movie trilogy. This comprehensive volume details the, aliens, cultures and geography of both Yavin and Bespin.
Galaxy Guide 2: Yavin and Bespin Planet Profiles provides newly-disclosed data that will fascinate movie fans and Star Wars game players alike.