Britt Marie Was Here by Fredrik Backman (2016) Simon & Schuster

A woman who was cheated on insists on making a new life elsewhere and finds it hard to change, and then finds herself changed anyway, by life, by people, by understanding more about herself.
Britt Marie has let life pass her by, watching her father, then her mother, give-up over time since the death of their other daughter, spending her time raising her husband’s children, and taking care of him  Then he had a heart attack and the other woman called her.  Britt-Marie saw that he was on the mend, then went home, packed a bag and left.  Now she’s in Borg, a small town that has been shutting down, working as the caretaker of the Recreation Center.  She’s inherited a soccer team, actually just a group of local kids.  She likes things to be neat and tidy.  So, she changes Borg, and it changes her.