John Coffren Books

Star Trek: Strange New Worlds IX

By Allison Cain, Jim Johnson, Kevin Lauderdale, Scott Pearson, Dean Wesley Smith, Ryan M Williams, R. S. Belcher, Gerri Leen, Jeff D. Jacques, Ben Guilfoy, Paula M Block, Kenneth E Carper, Mike McDevitt, Russ Crossley, Jeremy Yoder, Paul C. Tseng, Elisa J. Kassin, Randy Tatano, David DeLee, A. Rhea King, Marc Carlson, John Coffren, Susan S. McCrackin, Catherine E. Pike, Emily P. Bloch, Steven Costa

Average: 0.00, 0 Ratings

The tales featured in Strange New Worlds rocket readers across the length and breadth of Federation time and space, from Captain Jonathan Archer's first exploration of the galaxy on board the very...

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.