Markus Plötz Books

Torg Eternity Core Rules

By Markus Plötz, Shane Lacy Hensley, Aaron Acevedo

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The Dark Eye Core Rules

By Markus Plötz, Jens Ullrich, Alex Spohr, Tobias Rafael Junge

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The Dark Eye is Germany’s premiere fantasy role-playing game, in continuous publication for more than 30 years, now in English in this exciting new edition. You and your friends play the leading ro...

The Dark Eye - Core Rules Pocket Edition

By Markus Plötz, Jens Ullrich, Alex Spohr, Tobias Rafael Junge

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The Dark Eye’s Core Rules book presented in a soft-cover, digest-sized format. Same content and layout as the full-sized hardcover, just in digest size. The Dark Eye is Germany’s premiere fantasy...

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.