Deborah Heiligman Books

The Boy Who Loved Math The Improbable Life of Paul Erdos

By Deborah Heiligman

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From Caterpillar to Butterfly

By Houghton Mifflin Harcourt Publishing Company

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She Persisted: Clara Lemlich

By Deborah Heiligman, Chelsea Clinton, Alexandra Boiger, Gillian Flint

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Inspired by the #1 New York Times bestseller She Persisted by Chelsea Clinton and Alexandra Boiger, a chapter book series about women who stood up, spoke up and rose up against the odds--including...

Houghton Mifflin Reading the Nation s Choice

By Houghton Mifflin Company Staff

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Too Perfect Eek Stories to Make You Shriek

By Deborah Heiligman

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Barbara McClintock

By Janet Hamlin, Deborah Heiligman

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Fun Dog Sun Dog

By Deborah Heiligman

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Cool dog school dog

By Deborah Heiligman

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When Tinka the dog follows her owner to school and creates havoc, the children discover a way to let her stay in the classroom and help.

Fun Dog Sun Dog

By Tim Bowers, Deborah Heiligman

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Levin the Pig

By Deborah Heiligman

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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.