Guy Riessen Books

Urban Temples Of Cthulhu - Modern Mythos Anthology

By Kelda Crich, M. S. Swift, Stuart Conover, David F. Gray, Jeff C. Stevenson, Kevin Wetmore, Steven A. Roman, Carl R. Jennings, Khurt Khave, James Pratt, Jaap Boekestein, Jill Hand, Aaron Besson, Guy Riessen, First United Church Of Cthulhu, Allen Griffin, Brian H. Seitzman, M. C. Bluhm, David Acord

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Piercing The Veil: A Supernatural Occult Thriller

By Guy Riessen, Riessen, Guy

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What Dwells Below

By Brent Abell, Christofer Nigro, Jason L Kawa, S. K. Gregory, Nicholas Paschall, Guy Riessen, Jason Kawa, Ray Zacek, Jonah Buck, Peter Oliver Wonder, Sheldon Woodbury

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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.