V. E. Schwab's ExtraOrdinary

Twelve years ago, Eli Cardale and his college friend, Victor Vale, developed ExtraOrdinary abilities after experimenting with near-death experiences. When Victor accidentally killed Eli's girlfriend after his ExtraOrdinary abilities span out of control, he fled the scene and disappeared. Eli swore his revenge and for ten years he hunted for Victor before finally tracking him down and attacking him, for which he was promptly arrested.

But instead of incarceration, Eli found himself conscripted by the mysterious EON organization and tasked with hunting down and killing any other EO he could find.

When reports of high school student Charlotte Till's miraculous near-depth escape from a terrible bus crash reached Eli, he knew he had found his next target...