Hilda Simon Books

The Racers

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Briefly discusses the mechanics of animal speed and the characteristics of 14 of the fastest creatures on land, sea, and in the air, including the dragonfly, marlin, and jackrabbit.

Milkweed butterflies

By Hilda Simon

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Introduces the butterfly family, their methods of camouflage and mimicry, and their reproduction and maturation cycles.

Exploring the World of Social Insects

By Hilda Simon

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Our six-legged friends and allies

By Hilda Simon

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Describes the physical characteristics, habits, natural environment, and ecological role of such insects as dragonflies, ladybirds, and wasps.

Snails of Land & Sea

By Hilda Simon

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Describes the evolution and anatomy of different types of land and sea snails and explains how they are beneficial and harmful to man.

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.