Now more than ever,<em>Gravitation and Spacetime</em>, Second Edition, by Hans C. Ohanian and newcoauthor Remo Ruffini, deserves John Wheeler's praise as "the best bookon the market today of 500 pages or less on gravitation and generalrelativity." <em>Gravitation and Spacetime</em> has been thoroughly updated with the mostexciting finds and hottest theoretical topics in general relativity andcosmology. Highlights of the revision include the rise and fall of thefifth force, principles and applications of gravitational lensing,COBE's spectacular confirmation of the blackbody spectrum of the cosmicthermal radiation, theories of dark matter and inflation, and the earlyuniverse as a testing ground for particle physicists' unificationtheories, and much, much more.<br /><br />The ideal choice for a graduate-level introduction to generalrelativity, <em>Gravitation and Spacetime</em> is also suitable for an advancedundergaduate course.