Carl Sagan once noted that there is only one generation that gets to see things for the first time. We are in the midst of such a time right now, standing on the threshold of discovery in the young and remarkable field of X-ray astronomy. In The Restless Universe, astronomer Eric Schlegel
offers readers an informative survey of this cutting-edge science.
Two major space observatories launched in the last few years--NASA's Chandra and the European...