John W. Mangrum Books

154 pages : 28 cm The Fires of Righteousness Creatures of the night, be warned. From the lost notebooks of Rudolph Van Richten comes a new entry in the library of the greatest vampire-hunter to eve...

Ravenloft Gazetteer II

By John W. Mangrum, Jackie Cassada, Nicky Rea, Steve Miller, Andrew Wyatt

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Ravenloft Gazetteer III

By Jackie Cassada

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Ravenloft Gazetteer, Vol IV

By John Mangrum, John W. Mangrum, Anthony Pryor, Ryan Naylor, James Lowder, Andrew Wyatt, Jackie Cassada, Voronica Whitney-Robinson

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Legacies of Violence Twisted shapechangers and immortal tyrants strike terror into the denizens of Ravenloft's southwestern Core. The twisted desires of Borca's dual rulers, the curse at the heart...

Ravenloft

By John W. Mangrum, Jackie Cassada, Nicky Rea, Andrew Cermak, Andrew Wyatt

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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.