One Last Breath by Ginny Myers Sain

In a small Florida town haunted by a decades-old murder, Tru finds herself drawn into the chilling mystery surrounding the deaths of best friends Bailey and Celeste. Living in the shadow of these unsolved murders and her own sister's death, Tru seeks solace in the depths of Hidden Glen Springs.

When a mysterious girl named Rio arrives, determined to uncover the truth behind the killings, Tru can't resist joining her quest. Despite the danger looming over their investigation, Tru can't ignore her growing attraction to Rio or the otherworldly connection they share with Bailey and Celeste.

As the summer heats up, so does the tension between Tru and Rio, fueled by their shared mission and the sinister presence lurking in their town. With each discovery, they unearth more secrets and unearth the possibility that the killer may still be among them.

As they delve deeper into the past, Tru and Rio realize they may be putting themselves in the killer's sights. With their lives at stake, they must race against time to uncover the truth before it's too late. But as they unravel the mystery, they come to understand that some secrets are best left buried, and that the darkness of Mount Orange may hold more than they ever imagined.