5.75" x 8.5", 223 page hardcover with slipcase titled PEBBLE IN THE SKY by Isaac Asimov/ Doubleday, Special 40th anniversary edition published in 1990 and signed by Asimov and numbered 905/1500 copies. Included is a small booklet laid in.  

Pebble in the Sky is a science fiction novel by American writer Isaac Asimov, published in 1950. This work is his first novel — parts of the Foundation series had appeared from 1942 onwards in magazines, but Foundation was not published in book form until 1951.

The book begins with a retired tailor from the mid-20th century, who is accidentally pitched forward into the future. By then, Earth has become radioactive and is a low-status part of a vast Galactic Empire. There is both a mystery and a power-struggle, and a lot of debate and human choices. The protagonist is a very ordinary man, rather than the more typical space opera hero.

This book takes place in the same universe as the Foundation series. Earth is part of the Empire of Trantor, later the setting for Hari Seldon's invention of psychohistory. Asimov returned to the radioactive-Earth theme in The Stars, Like Dust; The Currents of Space; and Foundation and Earth. He would explore it most fully in Robots and Empire.

The book is complete and in EXCELLENT condition with some overall light wear.