Ulrik Hvass Books

How do I breathe?

Average: 0.00, 0 Ratings

Describes, in simple terms, the process of breathing, how the lungs absorb oxygen from the air and expel water vapor and carbon monoxide.

How my heart works

By Ulrik Hvass

Average: 0.00, 0 Ratings

Demonstrates how the heart acts as a pump to move blood along the arteries and veins to all parts of the body.

How my body moves

By Ulrik Hvass

Average: 0.00, 0 Ratings

Describes how the human brain, nerves, muscles, joints, and bones of the skeletion work together to make movement possible.

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.