Book excerpt: The majority of this book is an insider's account of the US Space Shuttle program, including the unforgettable experience of launch, the delights of weightless living, and the challenges of constructing the International Space Station. Ross is a uniquely qualified narrator. During seven spaceflights, he spent 1,393 hours in space, including 58 hours and 18 minutes on nine space walks. Life on the ground is also described, including the devastating experiences of the Challenger and Columbia disasters. --