Berlin may be a great album, it’s just not an easy one to listen to. It's intensely dark in its lyrical content, charting the doomed relationship of Caroline and Jim following them through drug addiction, domestic violence and suicide. Not the cheeriest of subjects for a concept album.First released in 1973, it was a commercial failure but became a cult classic. Berlin came hot on the heels of Reed’s glam rock masterpiece Transformer. Anyone expecting a commercial follow-up was non-plussed to say the least.