“Cassius”: that was the nickname given by Cologne’s tabloids to the cheeky, carefree FC coach who jolted German football out of its slumber in 1989, challenged mighty Bayern, took a brutal pounding, and then helped create one of the most unforgettable television appearances in German football history. Another Cologne figure, in the turbulent 1980s, set off an avalanche with a highly explosive book project. These are the sort of scandal stories and glorious cringe moments that define 1. FC Köln.