Liv Constantine is the pen name of sisters Lynne Constantine and Valerie Constantine. Separated by three states, they spend hours plotting via FaceTime and burning up each other's inboxes. They attribute their ability to concoct dark story lines to the hours they spent listening to tales handed down by their Greek grandmother. You can find more about them at: livconstantine.com. Their latest book, The Wife Stalker, is now available from Harper.