What was The Who's second studio album?

The Who's second studio album was A Quick One.

Released in the United Kingdom on December 9, 1966, A Quick One followed the band's debut album, My Generation. It marked an important change in the group's creative development because songwriting was shared more widely among the four members. Roger Daltrey, John Entwistle, and Keith Moon all contributed songs, rather than leaving Pete Townshend as the dominant writer.

The album includes “Happy Jack,” “So Sad About Us,” “Heat Wave,” and the ambitious closing suite “A Quick One, While He's Away.” That suite is often viewed as an early step toward the larger rock-opera ideas the Who later developed in Tommy.

A common mix-up is to identify Tommy as the second album because it is one of the band's most famous early records. In fact, Tommy was the fourth studio album. Face Dances and Who's Next came later, in 1981 and 1971 respectively. The Who's first studio album was My Generation, released in 1965.