Space, as scientists are increasingly learning, is very hard on the human body. In Why Am I Taller? ($17.95), authors Dave Williams (a doctor and former Canadian Space Agency astronaut) and Elizabeth Howell (a staff writer at Space.com) explore the various ways in which spaceflight changes the body. In addition to detailing detrimental health effects such as excessive exposure to radiation, bone and muscle loss, and cellular damage, the authors explore potential medical solutions to these serious problems. This book will be of interest to anyone who’s curious about living in space and the types of issues we’ll have to deal with as we set our sights on Mars and other celestial destinations.