Book Beginnings on Friday is a meme hosted by Gilion at Rose City Reader. Anyone can participate; just share the opening sentence of your current read, making sure that you include the title and author so others know what you're reading.
The Best of Everything by Rona Jaffe
"You see them every morning at a quarter to nine, rushing out of the maw of the subway tunnel, filing out of Grand Central Station, crossing Lexington and Park and Madison and Fifth avenues, the hundreds and hundreds of girls."
The author says in the forward that this opening image came to her all at once and it never changed as she wrote the book: the parade of young women (not girls, actually) entering the workforce in the 1950s