"Born Under the Dome", a novel, 2018, the first book in the "Pixel" series.
This is a world of camps covered by a dome and shrouded in mystery. Inside, everything is ordinary and predictable. You can’t get out beyond the dome. But the main character is drawn to the vastness and distance, so he sets out for the Wild Forest—a place filled with magical creatures and hidden from prying eyes.
In the Wild Forest, he encounters a group of the "arisen" and realizes that he is different from those who inhabit the world under the dome. And only if you have a soul can you possibly escape."