Thomas R. Holtz Books

Jurassic World dinosaur field guide

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Tour the age of dinosaurs with this colorful, authoritative, easy-to-read field guide. -- Profiles one hundred dinosaurs and other prehistoric creatures, and includes information on dinosaur digs,...

The Complete Dinosaur Second Edition

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The complete dinosaur

By James Orville Farlow, M. K. Brett Surman, Thomas R. Holtz

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Jurassic Park InstituteTM Dinosaur Field Guide

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Dinosaurs

By Thomas R. Holtz

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Jurassic World Dinosaur Field Guide (Jurassic World)

By Robert Walters, Michael Brett Surman, Thomas R. Holtz

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Jurassic World is the long-awaited next installment of the groundbreaking Jurassic Park series. T. rex’s, velociraptors, triceratops—as well as some all-new dinosaurs—will roar across the screen in...

The Little Giant book of Dinosaurs

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Complete Dinosaur

By Michael K. Brett Surman, James O. Farlow, Thomas R. Holtz

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Digging for Brachiosaurus

By Kathryn N. Clapper, Thomas R. Holtz

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Digging for Stegosaurus

By Kathryn N. Clapper, Thomas R. Holtz

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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.