Kenneth Oppel 
Such Wicked Intent [EPUB ebook] 

Tragedy has forced sixteen-year-old Victor Frankenstein to swear off alchemy forever. He burns the Dark Library and vows he will never dabble in the dark sciences again-just as he vows he will no longer covet Elizabeth, his brother’s betrothed.If only these things were not so tempting.When he and Elizabeth discover a portal into the spirit world, they cannot resist. Together with Victor’s twin, Konrad, and their friend Henry, they venture into a place of infinite possibilities where power and passion reign. But as they search for the knowledge to raise the dead, they unknowingly unlock a darkness from which they may never return.