From Wikipedia:

Bringing It All Back Home (known as Subterranean Homesick Blues in some European countries; sometimes also spelled Bringin' It All Back Home) is the fifth studio album by American singer-songwriter Bob Dylan. It was released in March 1965, by Columbia Records.

The first half of the album features electric songs, followed by mainly acoustic songs in the second half. The album abandons the protest music of Dylan's previous records in favor of more surreal, complex lyrics.  On side one of the original LP, Dylan is backed by an electric rock and roll band—a move that further alienated him from some of his former peers in the folk music community.