Jill Castle Books

Eat Like A Champion: Performance Nutrition For Your Young Athlete

By Ms, Rdn, Jill Castle, Castle, Jill, Cdn

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Kids have their own nutritional needs--especially athletic kids. Yet most young athletes aren't eating properly to compete. Even if they're on a "healthy" diet, it's often supplemented by convenien...

The Smart Mom s Guide to Starting Solids

By RD Jill Castle MS

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Fearless feeding

By Jill Castle

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"An essential guide to understanding and improving any child's eating habits This comprehensive nutrition guide gives parents the tools for encouraging kids of any age on the path to healthy eating...

The Smart Mom'S Guide To Starting Solids

By Jill Castle

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The One-Stop Nutrition Resource for Starting Your Baby on Solids Your baby's food journey and future health begins with his first bite. From tasting new flavors and textures to learning how to eat...

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.