The world turned upside down

de David Drake, Eric Flint, Jim Baen, Isaac Asimov

A superlative anthology featuring some of the finest science fiction works ever published features stories by such masters as Robert A. Heinlein, Arthur C. Clarke, Isaac Asimov, Poul Anderson, Gordon R. Dickson, and others, in a collection that features tales selected for their ground-breaking exploration of new worlds.