Frances L. Ilg Books

A three-year-old is a real puzzle to parents, sometimes anxious to please and befriend, sometimes strong-willed and difficult to get along with. At the heart of the three-year-old’s personality is...

Your One-Year-Old

By Frances L. Ilg, Louise Bates Ames

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The child from twelve to twenty-four months of age is a joy to have around—some of the time, that is. This child is growing at an incredible rate, learning to walk, learning to touch, learning to l...

Your Five-Year-Old

By Louise Bates Ames

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A five-year-old is a wonderful, fun-loving, exuberant child. But what’s going on inside that five-year-old head? What stages of development does a child this age go through, and what should parents...

Your Six-Year-Old

By Frances L. Ilg, Louise Bates Ames

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The six-year-old is a complex child, entirely different from the five-year-old. Though many of the changes are for the good -- Six is growing more mature, more independent, more daring and adve...

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.