Don Lessem Books

Armored dinosaurs

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Describes how armor helped dinosaurs such as Albertosaurus and Edmontonia to survive attack, as well as how scientists have learned about armored dinosaurs through studying fossils.

Giant meat-eating dinosaurs

By Don Lessem

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Describes how giant carnivorous dinosaurs hunted, as well as how scientists have learned about them through fossil studies.

Flying giants of dinosaur time

By Don Lessem

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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.

Don Lessem Books

Submarines War Machines

Armored dinosaurs

Duck-billed dinosaurs

Giant meat-eating dinosaurs

Giant plant-eating dinosaurs

The smallest dinosaurs

The smartest dinosaurs

Feathered dinosaurs

Flying giants of dinosaur time

Sea giants of dinosaur time

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

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