Susan Perry Books

Identifies the four food ingredients that should be avoided, sugar, fat, salt, and nasty additives, and discusses why foods containing too much of them are bad for you.

How are You Feeling Today?

By Susan Perry

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Discusses various aspects of mental health, including self-perception, mental illness, emotional problems, and getting help.

The secrets our body clocks reveal

By Susan Perry

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Remembering O-Sensei

By Susan Perry

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Morihei Ueshiba (18831969), founder of the Japanese martial art of Aikido, is one of the greatest and most beloved martial artists in history. Remembering O-Sensei is a portrait of Ueshiba...

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.