Beautiful, drug-addicted singer Daisy and the band The Six come together to write an album in the 70s. The entire book is told in an interview format, which I think works really well, since it lets the different characters give their own (slightly different) perspectives on certain events.
The author tried to incorporate some sort of twist to the ending but it wasn't a particularly revelatory or "wow" moment for me. Nonetheless, Taylor Jenkins Reid has once again done a really good job with writing out a cast of believable, very human characters.