Vicious (V. E. Schwab)

A very comic-book story, where people have super powers and make dastardly plots against a nemesis, and I loved it. Victor and Eli were brilliant college students when they started studying the origin of people with extraordinary abilities. Their research turned to experimentation, and then turned to death and destruction. Along the way we meet a pair of sisters joined by love and death, a giant tattooed man whose specialty is computer hacking, and a dog with the lives of a cat. The larger-than-life plot played out with just the right mix of inevitability and surprise, and the ending held as much tenderness as you could hope for. This is the author's first adult novel; I hope for more.