Wild Blood (1999) is a fantasy novel by Kate Thompson. It concludes the stories of Tess, a young Irish shapeshifter (or "Switcher", as they are called in the novel), and Kevin, a former Switcher. It also introduces several other characters, such as Tess's three cousins and their father Maurice. The plot deals with the events leading up to Tess's fifteenth birthday, the day on which all Switchers lose their powers forever, and must choose a permanent form in which to spend the rest of their lives.