Valley of the Dolls by Jacqueline Susann

Dolls: red or black; capsules or tablets; washed down with vodka or swallowed straight-for Anne, Neely, and Jennifer, it doesn't matter, as long as the pill bottle is within easy reach. These three women become best friends when they are young and struggling in New York City and then climb to the top of the entertainment industry -- only to find that there is no place left to go but down -- into the Valley of the Dolls.

Paperback, 1967

Goodreads: 3.85