Juan Ferreyra Books

Declan Thomas is a former inmate of an insane asylum that was destroyed by fire. He has the strange ability to step inside a person's madness. Sometimes he can cure it. One day, he hopes to cure hi...

Colder Volume 3: Toss the Bones

By Paul Tobin, Juan Ferreyra

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When a mysterious madman returns to claim Boston's sanity, Declan Thomas can only fight him by fulfilling a dark prophecy. With each step, with each use of his abilities, with every ounce of effort...

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.