Until June by Aurora Rose Reynolds is the second book in the Until Her series. It is a spin-off to the Until series and focuses on the female offspring of the characters in that first series. It is not necessary to have read any previous books, you could jump right in but they are all so fabulous I recommend reading them all, and if you're going to read them all, read them in order. 
 This story focuses on June, her secret ex-husband Evan, and the struggle they face together as events unfold in her life and he tries to protect her. Meanwhile she is trying to fight the darkness inside him that took up residence while he was away at war. It is a wonderful story that is very well-written and flows smoothly along with only a few bumps along the way. I love all books by Aurora Rose Reynolds so far and this one did not disappoint. The ache they experience when they were separated was gut-wrenchingly angsty and the sweet victory of them reuniting was just beautiful.