Nick Del Calzo Books

The triumphant spirit

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Denver photographer Nick Del Calzo looks into the eyes of those who have witnessed man's most heinous horrors. His photography captures both the darkness of their pasts and the light of their souls...

The Triumphant Spirit

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Medal of Honor

By Peter Collier

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Since the Civil War more than 39 million men and women have answered the call to serve. Of those, 3,440 served with such uncommon valor and and extraordinary courage that they were presented with t...

Medal of Honor

By Peter Collier, Nick Del Calzo

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Medal of Honor

By Peter Collier, Nick Del Calzo

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Wings of Valor

By Peter Collier, Nick Del Calzo

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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.