J. Gregory Keyes

A Calculus of Angels

The Age of Unreason #2

by J. Gregory Keyes

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....

Empire of Unreason

The Age of Unreason #3

by J. Gregory Keyes

When Sir Isaac Newton uncovered the secrets of alchemy, he could never have imagined the incredible and tragic results. Dark sorcery rules: Europe is lost and the American colonists have been driven south by...

The Shadows of God

The Age of Unreason #4

by J. Gregory Keyes

BOOK FOUR: THE SHADOWS OF GOD

As the armies of the Malakim advance, led by a child of bright and burning power, Benjamin Franklin must summon all his ingenuity for the desperate attempt to preserve, not just...

Newton's Cannon: Book One of THE AGE OF UNREASON

The Age of Unreason #1

by J. Gregory Keyes

A dazzling quest whose outcome will raise humanity to unparalleled heights of glory--or ring down a curtain of endless night . . .

1681: When Sir Isaac Newton turns his restless mind to the ancient art of alchemy,...