Montgomery Bus Boycott and the Women Who Started It: the Memoir of Jo Ann Gibson Robinson
Per Mrs. Robinson (all titles are listed, which jarred me at first until I realized why that would have been a big deal), Rosa Parks was actually just tired that day. I mean, she was part of it and all, but the boycott wasn't planned until after her arrest. The "Women Who Started It" were the three hundred members of Montgomery's three Women's Political Council chapters. Unfortunately the book is really more about the Montgomery Improvement Association (MIA) and Dr. King, than the women in the title.