Stuart A. Kallen Books

Describes the physical characteristics of Dalmatians and discusses how to care for them as pets. This popular series includes the history, biology, habits, and required care for dogs of all types....

The race to space

By Stuart A. Kallen

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Describes the early efforts to develop space flight capabilities, focusing on the competition between the United States and the Soviet Union.

The Mercury seven

By Stuart A. Kallen

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Describes the efforts of the Soviet Union and the United States to be the first to put a man into space, focusing on the early missions of Project Mercury.

The Apollo moonwalkers

By Stuart A. Kallen

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Tells the story of NASA's mission to put a man on the moon through Project Apollo which completed six moon landings between 1969 and 1972.

The Gemini spacewalkers

By Stuart A. Kallen

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Discusses Project Gemini's two unmanned and ten manned missions; spacewalking, the spacewalkers, and their Soviet counterparts; and moving on to Project Apollo and the moon.

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.