Andrea Cremer is the author of the Nightshade series, which includes Nightshade, Wolfsbane, Bloodrose, Rift, and Rise, which are all international bestsellers. She is also the co-author of Invisibility, a novel she co-authored with David Levithan. She went to school until she couldn't go any longer, eventually earning a Ph.D. She specialized in early modern history--a reflection of her interest in witchcraft and warfare--and taught at Macalester College for many years. She grew up roaming northern Wisconsin's forests and lakeshores, but now calls Minneapolis home. @andreacremer www.andreacremer.com