Sonny Gratzer Books

Mountain Meadow Amore

By Sonny Gratzer

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General Issue Blues: Viet Nam To Here: A Warrior'S Tour

By Sonny Gratzer, George Michael Gratzer

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General Issue Blues, Viet Nam To Here: A Warrior'S Tour

By Sonny Gratzer, George Michael Gratzer

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Ebb

By Sonny Gratzer, Gratzer, Sonny

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Ebb is a book of love, love gained and lost, both painful and joyful but most of all, love that ends before we think it should. It's about opening our hearts for love, to enjoy being with another t...

Ninety Days

By Sonny Gratzer

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Mountain Meadow Amore

By Sonny Gratzer

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Ninety Days

By Sonny Gratzer

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Ninety Days

By Sonny Gratzer

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Ninety Days

By Sonny Gratzer

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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.