10 pages in and I was getting annoyed. Why does the writing style feel like an 8th grader's English assignment that they didn't want to do? Kristin Hannah has been writing for decades, I KNOW she can write better than this. This felt rushed, as if she shoved the book out as quickly as she could. 
The paragraph that immediately follows Rye telling Frankie that women can be heroes is just? I'm sorry, I know its supposed to be the 60s, but Kristin Hannah, writing in the 21st century, still puts a paragraph in her book about a woman not realizing she has worth until a man tells her she does (this could have been accomplished by a female nurse or other peer, but it had to be a man, and a romantic interest).
There is also a distinct sense of white woman racism that masquerades as anti-racism. Beginning with Frankie and Ethel both having family pictures to put up and Barb only having pictures of Civil Rights leaders, as if her own humanity and family don't matter. This continues with the white perspective of civil rights after Frankie and Co. come home. 
I also think the romances in this book would have bothered me more if I wasn't so bored with them. They were flat, 1-dimensional, and it felt like they were only there because romance is expected for a character like this. 
All in all, I struggled to get through this book. I had to force myself to read it, and if it weren't for the fact that I promised someone I would finish it  I would have DNF'd it.