Smallville: Harbinger is a four-issue comic miniseries based on the popular T.V. show Smallville. The book stars Zatanna and John Constantine in a duo. Searching for her father's 'Book of Magick' in England, Zatanna faces a member of the Cult of Blood, but is saved by Constantine. They team up to rescue Rachel Roth and retrieve the Book of Magick from Brother Blood.