Peter Castle Books

Collecting and valuing old photographs

By Peter Castle

Average: 0.00, 0 Ratings

Collecting and valuing old photographs

By Peter Castle

Average: 0.00, 0 Ratings

Collecting and valuing old photographs.

By Peter Castle

Average: 0.00, 0 Ratings

El trader Zen

By Manuel Manzano Gomez, Peter Castle

Average: 0.00, 0 Ratings

Trading is a stressful occupation, with mental and emotional traps on every side. Our instincts drive us to self-destruction: holding plummeting stocks in the hope of a sudden recovery, or obsessin...

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.