A Calculus of Angels (The Age of Unreason, Book 2) by J. Gregory Keyes
English | Feb. 29, 2000 | ISBN: 0345406087 | 321 Pages | PDF | 2 MB
1722: A second Dark Age looms. An asteroid has devastated the Earth, called down by dire creatures who plot against the world of men. The brilliant- some say mad-Isaac Newton has taken refuge in ancient Prague. There, with his young apprentice Ben Franklin, he plumbs the secrets of the aetheric beings who have so nearly destroyed humanity.