Audrey Niffenegger's novel The Time Traveler's Wife is equal parts romance and sci-fi. It's a love story about the limits of free will and the power of destiny. It is also a way hornier book than we gave it credit for.Talking points include James Cameron's avatar, time-travelling hi-jinks, and chrono-impairment as a metaphor for absence, loss, and the gravitational pull of love.