Frater Albertus Books

"If you really want to learn the basic principles of practical alchemy, Frater Albertus' Alchemist's Handbook is literally is worth its weight in gold."—from the foreword by Israel Regardie, auth...

Alchemists Handbook

By Frater Albertus

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Praxis Spagyrica Philosophica Ot Plain and Honest Directions on How to Make the Stone

By Frater Albertus

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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.