Alchemy of Secrets - Stephanie Garber

Holland St. James takes a folklore class in an old movie theatre, convinced that the magic her professor teaches is real. When she seeks out the Watch Man, a local legend said to know how people die, he tells her she’ll be dead by midnight tomorrow unless she finds the Alchemical Heart. Thrust into a hidden magical side of Los Angeles, Holland races against time to survive. She’s aided by a dangerous, magnetic stranger who claims her sister sent him to protect her — though nothing about him feels trustworthy. As clues unravel and lies surface, Holland realises everyone in this world has secrets. If she chooses the wrong person to trust, even magic won’t save her life.