发行过黑胶，CD，美版英版，曲目和顺序均有不同，虾米收录为CD1美版顺序加2013豪华版，具体参看wiki。
http://en.wikipedia.org/wiki/Then_Play_On

Then Play On is the third studio album by blues-rock band Fleetwood Mac, first released in September 1969. It was the first of their original albums to feature Danny Kirwan and the last with Peter Green. Jeremy Spencer did not feature on the album apart from "a couple of piano things" (according to Mick Fleetwood in Q magazine in 1990). The record, appearing after the group's sudden success in the pop charts, offered a broader stylistic range than the classic blues of the group's first two albums. The title is taken from Duke Orsino's opening line, "If music be the food of love, play on," from William Shakespeare's comedy play Twelfth Night.

This was the band's first release with Warner/Reprise after being lured away from Blue Horizon and a one-off with Immediate Records. Forty years on, Fleetwood Mac remain with Warner. The album, which at its original UK release had an unusually long running time, has been released with four different song lineups. The currently-available CD compiles all songs from the two US LP versions, both of which omitted tracks from the original UK version.

In 2013, It was announced that the album would be remastered.