John Hargrove Books

The weavers draft book and clothiers assistant

By John Hargrove

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Beneath the surface

By Hargrove John Animal Trainer

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A firsthand account of the lives of captive killer whales by one of SeaWorld's most experienced orca trainers and the star of Blackfish argues that their needs are not met in captivity and traces a...

The weavers draft book and clothiers assistant

By John Hargrove

Average: 0.00, 0 Ratings

Beneath the Surface

By Howard Chua Eoan, John Hargrove

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Over the course of two decades, John Hargrove worked with 20 different whales on two continents and at two of SeaWorld’s U.S. facilities. For Hargrove, becoming an orca trainer fulfilled a ch...

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.