Gregory L Vogt Books

Solar system

By Gregory L. Vogt, Gregory Vogt

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Describes the Sun, planets, and other objects in the solar system.

Space walking

By Gregory Vogt

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Describes the history of space walking and the technological advances that have made it possible. Also explains how space suits and space walkers work and discusses future experiments.

Halley's comet

By Gregory Vogt

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Describes the discovery of Halley's comet and the research carried out around the world when the comet returned in 1986.

An album of modern spaceships

By Gregory Vogt

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An illustrated history of developments in manned spaceships, including a discussion of future programs and the effect of the "Challenger" tragedy.

Space exploration projects for young scientists

By Gregory Vogt

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Suggests projects demonstrating such outer space principles and phenomena as gravity wells, rocket propulsion, and planetary motion.

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.