Gary Jennings Books

Discusses man's wasteful and ignorant acts which have destroyed the balance of the environment and resulted in the extinction of many living things as well as endangering man.

The rope in the jungle

By Gary Jennings

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A young boy and a ropemaker try to unravel the mystery connecting a scientific expedition, a mining operation, and an ancient Indian tribe.

The earth book.

By Gary Jennings

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Examines the many different kinds of pollution to which man is subjecting the earth and outlines some steps the reader can take to deal with this problem.

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.