Stuart A. Kallen Books

Exotic Shorthair Cats Cats Set II

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Oriental Shorthair Cat Cats Set II

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Black bears

By Stuart A. Kallen

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Briefly describes the physical characteristics, habitat, and behavior of black bears.

Grizzly bears

By Stuart A. Kallen

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Describes the physical characteristics, habitat, and behavior of this sub-species of brown bear.

Giant pandas

By Stuart A. Kallen

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Briefly describes the physical characteristics, habitat, and behavior of China's giant pandas.

Polar bears

By Stuart A. Kallen

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Briefly describes the physical characteristics, habitat, and behavior of polar bears.

Sun bears

By Stuart A. Kallen

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Describes the physical characteristics, behavior, habitat, and life cycle of this tropical bear, the smallest bear in the world.

Alaskan brown bears

By Stuart A. Kallen

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Briefly describes the physical characteristics, the habitat, and the behavior of the Alaskan brown bear.

The Way People Live Life on the American Frontier The Way People Live

By Stuart A. Allen, Stuart A. Kallen

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Discusses how people on the American frontier lived, including trailblazers, fur trappers, mountain men, Native Americans, miners, cowboys, and pioneers.

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.