Ricardo Delgado Books

Age of Reptiles

By Ricardo Delgado

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Age of reptiles omnibus

By Ricardo Delgado

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Dinosaur comics without captions.

Age of Reptiles: Ancient Egyptians

By Ricardo Delgado

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One of the most beloved and respected comic book series returns as Ricardo Delgado's Age of Reptiles: Ancient Egyptians series marks a bold, new direction in wordless storytelling. The steaming swa...

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.