Holly Hatam Books

Hair Twins

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This sparkly board book offers babies and toddlers a peek into the whimsical world of unicorns! A charming baby shower gift that will be read again and again!Stardust and glitter and rainbows, oh m...

Dragons Are Real!

By Holly Hatam

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This sparkly board book offers babies and toddlers a peek into the whimsical world of dragons. Discover what makes them so magical!Moonlight and courage and sparks, oh my! That's what dragons are m...

Mermaids Are Real!

By Holly Hatam

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Discover what makes mermaids so magical and become a true believer with this sparkly Mythical Creatures Are Real board book!Gemstone and sparkles and coral, oh my! That's what mermaids are made of!...

The Acadia Files

By Holly Hatam, Katie Coppens

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The Acadia Files

By Holly Hatam, Katie Coppens

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What Matters

By Holly Hatam, Alison Hughes

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Cranky Right Now

By Julie Berry, Holly Hatam

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Dear Baby

By Paris Rosenthal, Holly Hatam

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Dear Teacher

By Paris Rosenthal, Holly Hatam

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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.