Robert Hellenga Books

The FALL OF A SPARROW

By Robert Hellenga

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Blues Lessons

By Robert Hellenga

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"Growing up on his family's orchards in Appleton, Michigan, in the 1950s, Martin Dijksterhuis finds everything he needs in his extended family and in the land itself - in the reassuring routines of...

Blues lessons

By Robert Hellenga

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The Fall of a Sparrow

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Fall of a Sparrow

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Love Death Rare Books

By Robert Hellenga

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The Sixteen Pleasures

By Robert Hellenga

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The Sixteen Pleasures

By Robert Hellenga

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The confessions of Frances Godwin

By Robert Hellenga

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"The Confessions of Frances Godwin is the fictional memoir of a retired high school Latin teacher looking back on a life of trying to do her best amidst transgressions--starting with her affair wit...

Love Death Rare Books Lib E

By James Patrick Cronin, Robert Hellenga

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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.