If you're a fan of Mary Roach, you know ~exactly~ why you're a fan of Mary Roach. Maybe her choice of topics--sex, death, outer space, the paranormal, and now the human digestive system. Could be her sense of humor--6th grade potty humor with a dash more irreverence. Perhaps it's her smarts and fearlessness. She doesn't talk down to you and she'll try anything once. She loves the world a whole lot and wants to find out all about it, and have a great time in the process. Here's a list of suggested reading while you're waiting for her latest book, Gulp.