Lockyer John Books

Life In The Ocean Layers

By Lockyer John, Diana Noonan, Christi Sorrell, Moira Anderson, Tony Hyland, John Lockyer, Dianne Irving

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Explore the layers of the ocean! Students will learn about the animals and plants that live in the various zones: the sunlit zone, the twilight zone, the midnight zone, and the abyss zone. Along th...

Life In The Ocean Layers: Level 4

By Lockyer John, John Lockyer

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All the oceans in the world flow together into one big ocean called the World Ocean. There are different zones in the ocean called layers where different animals live and are provided with food. So...

The Humpback Whale

By Lockyer John, John Lockyer

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The river rapids ride

By John Lockyer

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Stars

By John Lockyer

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Trapped

By John Lockyer, Lockyer John

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Vida en las Capas Oceanicas

By John Lockyer

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Todo Sobre los Tiburones

By John Lockyer

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The humpback whale

By John Lockyer

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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.