Travis Langley Books

Game of Thrones psychology

By Travis Langley, Kyle Maddock

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Star Trek psychology

By Travis Langley

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The next entry in Sterling's pop culture psychology series features 20 essays and an exclusive interview with Rod Roddenberry--son of Star Trek creator Gene Roddenberry. In a fun and accessible way...

Wonder Woman psychology

By Trina Robbins, Travis Langley, Mara Wood

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"What can we learn about human psychology from a superhero who is mentally healthy? This compendium of 20 essays offers a fascinating analysis of the psychology behind one of the world's most famou...

Supernatural Psychology

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Westworld Psychology

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Black Panther Psychology

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Captain America vs. Iron Man

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Doctor Who Psychology

By Katy Manning, Esther Wane, Matthew Lloyd Davies, Travis Langley

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Captain America vs. Iron Man

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Doctor Who Psychology

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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.