Hilda Simon Books

Partners Guests and Parasites Coexistence in Nature

By Hilda Simon

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Sight and seeing

By Hilda Simon

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Discusses the importance of the sense of sight, the difference between sensitivity to light and the actual formation of images, and the various sight organs found in animals.

Partners, guests, and parasites

By Hilda Simon

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Describes associations made between different animal species for temporary gain or convenience as well as more permanent alliances formed for mutual survival.

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.