In the book "Spook: Science Tackles the Afterlife," author Mary Roach explores the scientific investigation into concepts of the afterlife. She delves into various studies and perspectives, addressing how science approaches ideas of existence beyond death, often challenging traditional beliefs. Roach's narrative is engaging, mixing humor with a thoughtful examination of spiritual phenomena.

The quote, "You don't need proof. You just need an inclination," reflects the notion that personal belief often overrides empirical evidence when it comes to topics like the afterlife. Roach emphasizes that while science seeks proof, the human inclination towards belief can be powerful and deeply rooted, influencing how individuals interpret life's mysteries.