"Mr. Holt picks up this question about being versus nothingness and runs quite a long and stylish way with it. He combines his raffish erudition with accounts of traveling to tap the minds of cosmologists, theologians, particle physicists, philosophers, mystics and others."—NYTimes

"The pleasure of this book is watching the match: the staggeringly inventive human mind slamming its fantastic conjectures over the net, the universe coolly returning every serve.... Holt traffics in wonder, a word whose dual meanings—the absence of answers; the experience of awe—strike me as profoundly related. His book is not utilitarian. You can't profit from it, at least not in the narrow sense.... And yet it does what real science writing should: It helps us feel the fullness of the problem."—NYMagazine