Here's my list of books I mentioned in last night's 'Ten books in 15 minutes' talk...
Astronomy: A self-teaching guide, by Dinah L Moché - Very much a high school (GCSE-level) textbook, but useful introduction to astronomy concepts and vocabulary
Cosmos, by Carl Sagan - But of course. Do look out for the illustrated version. Original TV series available online
To Explain the World: The discovery of modern science, by Stephen Weinberg - Very much focused on the science, with almost 100 pages of technical/mathematical notes
The Sleepwalkers: A history of man's changing vision of the universe, by Arthur Koestler - Predominantly focused on the Copernicus/Kepler/Galileo era. Excellent
The Book Nobody Read, by Owen Gingerich - The remarkable detective story of how he traced 600 copies of Copernicus's De Revolutionibus and studied the scribbled annotations
The Right Stuff, by Tom Wolfe - Brilliant story of the Mercury astronauts
No Shadow of a Doubt, by Daniel Kennefick - Just-published book marking the 100th anniversary of the total solar eclipse that (more or less) proved that gravity can bend light
The Black Hole War: My battle with Stephen Hawking to make the world safe for quantum mechanics, by Leonard Susskind - A difficult topic made as accessible as possible
2010: Odyssey Two, by Arthur C Clarke - HAL, Heywood Floyd, and the Tycho Magnetic Anomaly in a planetary science-driven sequel to 2001
Insight Astronomy Photographer of the Year annual, by Royal Observatory Greenwich - Amazing