*I received a free copy of Sisters of Summer's End. This has in not way influenced my review which is honest and unbiased.*
Sisters of Summer's End was a solid story, with romance, friendship, family we choose, and two couples who deserved a HEA. I enjoyed getting to know Joy and Maris, as they got to know each other. Foster did well with Jack, too - as it's not always children in romances have a real role, and are well-rounded characters.
I found the ending to be a little 'too easy' but I still had a good time with this novel.