Summer in the Elevator by K.J. Sutton

Summer Fridley is comfortable. She has a steady job, a bearable apartment, and a longtime boyfriend. Her only plan for the hot months ahead is to stay afloat and continue the course. She’ll also avoid her mother as much as possible. She doesn’t believe in ghosts or magic. Every moment is known, every hour is predictable, every day is the same.
Until June 11th, 2018.
Her cell phone chimes with a text message from an unknown number. A simple message from someone named Isaac Fishburne. Summer doesn’t know that he died in the elevator and has remained there ever since. For years, Isaac watched the tenants of the apartment building. Something about Summer intrigues him. For the first time, he reaches out to someone living.
It may be a summer that changes them both… forever.