Mark E. Ahlstrom Books

The elk

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Discusses the life cycle of the elk, its characteristics, habitat, environment, predators, and its place in our world today in relation to man.

The moose

By Mark E. Ahlstrom

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Describes the physical characteristics, habits, and natural environment of the moose, the largest species of deer in the world.

The pronghorn

By Mark E. Ahlstrom

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Discusses how the pronghorn, once numbering 50,000,000, was reduced to 12,000 by the settlers' westward expansion, and then, with man's help, made a remarkable comeback.

The snow goose

By Mark E. Ahlstrom

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Discusses the habits and behavior of North America's snow goose, a survivor of the Ice Age.

The mule deer

By Mark E. Ahlstrom

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An introduction to the mule deer, native of North America, discussing its physical characteristics, habitats, and behavior.

The whitetail

By Mark E. Ahlstrom

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Discusses the physical characteristics, habits, behavior, and distribution of the white-tailed deer.

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.