James J. Haeck Books

Eldritch Lairs: For 5th Edition

By James J. Haeck, Jerry LeNeave, Mike Shea, Jerry Leneave, Bill Slavicsek

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The Game Master'S Book Of Legendary Dragons: Epic New Dragons, Dragon-Kin And Monsters, Plus Dragon Cults, Classes, Combat And Magic For 5th Edition RPG Adventures

By Jim Pinto, Luke Gygax, James Haeck, James J. Haeck, Jeff Ashworth, Aaron Hübrich, Dan Dillon, Cody C. Lewis, Aaron Hbrich

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Experience the wonder and terror of dragons as they were meant to be! - New and expanded edition of Legendary Dragons from the award-winning fantasy art studio Jetpack7 - Includes more than two doz...

Book of Lairs for 5th Edition

By Wolfgang Baur, James J. Haeck, Steve Winter

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Fight the Monster in its Den... If You Dare! Book of Lairs brings you 24 great monster lairs for 5th Edition play of the world's greatest roleplaying game! Each of these exciting and unusual battle...

Touch of Class

By A. Nova, Matt Roth, C. Davies, Josh Gentry, Mike Myler

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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.