Wendy K. Ulmer Books

My twelve Maine Christmas days

By Wendy K. Ulmer

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A "Maine" twist to the twelve days of Christmas, based on the traditional holiday carol.

A campfire for cowboy Billy

By Wendy K. Ulmer

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After a day of riding his stick horse, Splinter, across an imaginary landscape, Billy returns to the rooftop of his apartment to sit beneath the stars and remember Grandpa.

Zero Zilch Nada

By Wendy Ulmer, Laura Knorr

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Zero zilch nada

By Wendy K. Ulmer

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Zero Zilch Nada

By Wendy Ulmer, Laura Knorr

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Isn t for Fox

By Wendy Ulmer, Laura Knorr

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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.