Marianne Johnston Books

Elephants Past and Present (Johnston, Marianne. Prehistoric Animals and Their Modern-Day Relatives.)

By Marianne Johnston

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Discusses the prehistoric ancestors, evolution, and modern species of elephants.

Big cats past and present

By Marianne Johnston

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Describes the prehistoric ancestors, evolution, and modern-day members of the cat family.

From the dinosaurs of the past to the birds of the present

By Marianne Johnston

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Describes the evolution of dinosaurs and birds and discusses how the two groups may be related.

Sea turtles, past and present

By Marianne Johnston

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Discusses the prehistoric ancestors, evolution, modern species, life cycle, and endangered status of sea turtles.

Prehistoric Sharks and Modern Day Sharks Johnston Marianne. Prehistoric Animals and Their Modern Day Relatives.

By Marianne Johnston

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Horses past and present

By Marianne Johnston

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Discusses the prehistoric ancestors, evolution, and some modern breeds of horses.

American Legends

By Marianne Johnston, Frances E. Ruffin

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Wallabies and their babies

By Marianne Johnston

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Describes the characteristics of wallabies and how mother wallabies living in zoos are taught to care for their babies.

Beluga whales and their babies

By Marianne Johnston

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Describes the characteristics of beluga whales and how mother beluga whales living in aquariums are taught to care for their babies.

Snow leopards and their babies

By Marianne Johnston

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Describes the characteristics of snow leopards and how mother snow leopards living in zoos are taught to care for their babies.

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.