Alan Dean Foster 
Mission to Moulokin [EPUB ebook] 

For Ethan Frome Fortune and his musclebound sidekick Skua September, the frozen planet of Tran-ky-ky had become too much of a cold thing. Aboard their giant icerigger Slanderscree, they headed for the trading post of Brass Monkey to book a passage home. Then fate intervened with the news that their Tran friends were being exploited by ruthless off-world profiteers. To help, Ethan and Skua – interplanetary sales team extraordinaire – must make a desperate mission to Moulokin, the fabled fortified city across the frozen seas and ringed with chilling peril…