Double 180gm translucent blue vinyl LP pressing in gatefold jacket. Chicago (retroactively known as Chicago II) is the second studio album by Chicago-based American rock band Chicago. Like their debut album, Chicago Transit Authority, this was a double album. It was their first album under the name Chicago (the band's prior name, Chicago Transit Authority, was changed due to a threatened lawsuit from the actual mass-transit operator bearing the same name) and the first to use the now ubiquitous cursive Chicago logo on the cover.