Katrin Schumann Books

Mothers Need Time-Outs, Too: It's Good to be a Little Selfish--It Actually Makes You a Better Mother

By Susan Callahan, Katrin Schumann, Anne Nolen

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The Secret Power of Middle Children

By Katrin Schumann, Catherine Salmon Ph.D.

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Middle children are underachievers, overshadowed and overlooked, right? Wrong. Combining research in evolutionary biology, psychology and sociology with real-life stories, psychologist Catherine Sa...

The Forgotten Hours

By Katrin Schumann

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The Forgotten Hours

By Katrin Schumann

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The secret power of middle children

By Catherine Salmon

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This Terrible Beauty

By Robert Fass, Katrin Schumann, Kathleen Gati

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Mothers Need Time Outs Too

By Susan Callahan

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Forgotten Hours

By Katrin Schumann

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This Terrible Beauty

By Katrin Schumann

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This Terrible Beauty

By Katrin Schumann

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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.