This Dark Endeavor: The Apprenticeship of Victor Frankenstein by Kenneth Oppel

 In this prequel to Mary Shelley's gothic classic, Frankenstein, sixteen-year-old Victor Frankenstein begins a dark journey that will change his life forever. Victor's twin, Konrad, has fallen ill, and no doctor can cure him. Unwilling to give up on his brother, Victor enlists his beautiful cousin Elizabeth and his best friend, Henry, on a treacherous search for the ingredients to create the forbidden Elixir of Life. Impossible odds, dangerous alchemy, and a bitter love triangle threaten their quest at every turn.Victor knows he must not fail. But his success depends on how far he is willing to push the boundaries of nature, science, and love a?? and how much he is willing to sacrifice.