Prince Rogers Nelson released his first album in 1978. In the almost 40 years that followed he became a superstar, a recluse, an inspiration, an enigma, and a symbol. He was a master of reinvention, but the one constant in his astonishing career was his genius: as a singer, a songwriter, a performer and musician. He sold more than 100 million albums, won Grammys and an Oscar. His ability to fuse styles and genres made him one of the most unique, influential and beloved artists in music history. Here, music journalist Brian Morton reveals the highs and lows of an incredible musical life.