Steamy, magical, and enthralling, Sherrilyn Kenyon's Dark-Hunter series incorporates elements of ancient mythology in a saga of immortal warriors pledged to defending humankind against vampires known as Daimons (among other things). In our exclusive interview, Kenyon talks about her new book, Acheron, and how the mysterious allure of her latest leading man leaves him irresistible to humans and immortals alike.