Ken Gerhard Books

Wood Knocks Volume 1

By Linda Godfrey, David Weatherly, Nick Redfern, Lyle Blackburn, Ken Gerhard

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Encounters with flying humanoids

By Ken Gerhard

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A cryptozoologist provides historical cases, evidence, and first-person accounts of sightings of flying humanoids, including the Mothman, the Van Meter Creature, and the Houston Batman.

A Menagerie of Mysterious Beasts

By Ken Gerhard

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Monsters of Texas

By Nick Redfern, Ken Gerhard

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Menagerie of Mysterious Beasts

By Ken Gerhard

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Encounters with Flying Humanoids

By Ken Gerhard

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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.