1- Window Gazing

Aurelia Sky Foster lives in a normal town in California, with normal parents, and a normal life. But there's a black hole inside of her that makes her feel like something is missing.
That's when she realizes that the missing something is her twin sister, Sophie Elizabeth Foster.
When Sophie arrives at Aurelia's school, Aurelia gets cocky with sudden knowledge that no one else knew she possessed, including herself.
As dark thoughts follow her to the Lost Cities, Aurelia tries to figure out if her sister was a failed experiment, or if she was.

Thank you so much @bianaeliot for creating the cover for me it's amazing!