Asimov, Isaac

Each letter of the alphabet is represented by two words with definitions from the specialized vocabulary of space exploration.

Traces the history of Great Britain from the Stone Age to the signing of the Magna Carta during the reign of King John in 1215.

Chronicles the period of European history known as the Dark Ages, from the fall of the Roman Empire through the reign of Charlemagne and his successors to the first glimmer of a new age in 999.