Ears Pop is a 240 page, soft cover book in which the author answers 500 popular space questions, including: How does the space toilet work? Have astronauts seen any UFOs? Are astronauts superstitious? What's a Vomit Comet? How do astronauts eat, drink bathe, brush their teeth, etc.? Virtually every aspect of spaceflight is covered, including: space physics, living in space and space physiology. An entire chapter is devoted to the Challenger disaster. A veteran of three shuttle flights in space, COL Mullane will add a personalized dedication of your choice over his signature [This is the 4th of 5 copies available...while they last!]