Brendan Halpin Books

It Takes a Worried Man

By Brendan Halpin

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It takes a worried man

By Brendan Halpin

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Forever changes

By Brendan Halpin

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Although encouraged to apply to colleges, Brianna Pelletier, a mathematically-gifted high school senior with cystic fibrosis, dwells on her mortality and the unfairness of life.

How Ya Like Me Now

By Brendan Halpin

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Shutout

By Brendan Halpin

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Fourteen-year-old Amanda and her best friend Lena start high school looking forward to playing on the varsity soccer team, but when Lena makes varsity and Amanda only makes junior varsity, their lo...

It Takes a Worried Man

By Brendan Halpin

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Patterns of animal disease

By Brendan Halpin

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Subsidizing Jobs General Research

By Richard Breen, Brendan Halpin, Breen Richard

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Long Way Back

By Brendan Halpin

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Long Way Back

By Brendan Halpin

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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.