Keyes, Gregory J Books

A Calculus Of Angels

By J. Gregory Keyes, Greg Keyes, Keyes, Gregory J

Average: 0.00, 0 Ratings

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...

A Calculus Of Angels

By J. Gregory Keyes, Keyes, Gregory J

Average: 0.00, 0 Ratings

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...

Empire Of Unreason

By J. Gregory Keyes, Keyes, Gregory J

Average: 0.00, 0 Ratings

There has never been an epic quite like The Age of Unreason*. By interweaving reality with arcane fantasy, J. Gregory Keyes proves himself a literary alchemist who vividly recreates the eighteenth...

Blackgod

By J. Gregory Keyes, Keyes, Gregory J

Average: 0.00, 0 Ratings

A mythic tale of magic, passion, and primal power. In the rich and tragic world beyond the River, magic springs from the elements—and danger, fear, and friendship each wait to claim their place in...

Newton'S Cannon

By J. Gregory Keyes, Keyes, Gregory J

Average: 0.00, 0 Ratings

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...

The Shadows Of God

By J. Gregory Keyes, Keyes, Gregory J

Average: 0.00, 0 Ratings

�INVENTIVE AND EXCITING, FILLED WITH CLEVER DETAILS AND HIGH ADVENTURE, this brings to a close a sequence that seems likely to establish Keyes as one of the more significant and original new fantas...

The Shadows Of God

By J. Gregory Keyes, Keyes, Gregory J

Average: 0.00, 0 Ratings

A Calculus Of Angels

By J. Gregory Keyes, Keyes, Gregory J, J. Gregroy Keyes

Average: 0.00, 0 Ratings

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...

Empire Of Unreason

By J. Gregory Keyes, Keyes, Gregory J

Average: 0.00, 0 Ratings

There has never been an epic quite like The Age of Unreason*. By interweaving reality with arcane fantasy, J. Gregory Keyes proves himself a literary alchemist who vividly recreates the eighteenth...

Newton'S Cannon

By J. Gregory Keyes, Keyes, Gregory J

Average: 0.00, 0 Ratings

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.