Cover Reveal: The Days Lost by Shannon McCrimmon

Summary from Goodreads:

Part routine, part escape, running is Ellie Morales’ way of dealing with the grief of losing her mother. On the heels of her high school graduation, she is spending her summer vacation in Western North Carolina with her dad and brother, Jonah.

Shortly after sunrise each morning, Ellie and her dog, Bosco, set out for a lengthy run on the path that passes by her house and leads deep into the woods of the Blue Ridge Mountains. One fateful morning, Ellie is lead off of the trail and discovers a secret that will change her life, as well as the lives of the family she meets, forever. One member of this mysterious family is Sam Gantry, who seems unlike any guy she’s ever known.

This meeting sparks a series of events, causing Ellie to question everything she’s ever known and believed. The more she learns about Sam and his family, the more she wants to help him find the missing puzzle pieces.