Justin Halpern Books

Sh t My Dad Says

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Tuesdays with Morrie meets F My Life in this hilarious coming-of-age book about a son's relationship with his foul-mouthed father by the 29-year-old comedy writer who created the massively popular...

! My Dad Says

By Justin Halpern

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Sh t My Dad Says

By Justin Halpern

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I Suck at Girls

By Justin Halpern

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Presents a humorous collection of stories about the author's relationships with the opposite sex told chronologically, from his first kiss to getting engaged.

Shit My Dad Says

By Justin Halpern, Aa

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More Shit My Dad Says

By Justin Halpern

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Sh t Ansichten meines Dads

By Justin Halpern

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Parides del meu pare

By Justin Halpern

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Aitaren pitokeriak

By Justin Halpern

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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.