Cathryn Sill Books

About Birds

By Cathryn P. Sill

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About Insects

By Cathryn P. Sill

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Another field guide to little-known & seldom-seen birds of North America

By Ben L. Sill

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About birds

By Cathryn P. Sill

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Text and illustrations introduce the world of birds from eggs to flight, from songs to nests.

About Arachnids

By By Cathryn Sill Illustrated By John Sill

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Creepy crawlies and eight-legged wonders abound in this classroom favorite and beginner's guide to arachnids. In this book from the acclaimed About... series, educator and author Cathryn Sill uses...

About mammals

By Cathryn P. Sill

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Explains what mammals are, how they live, and what they do.

About birds

By Cathryn P. Sill

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Text and illustrations introduce the world of birds from eggs to flight, from songs to nests.

About Mammals

By Cathryn P. Sill, John Sill

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About Reptiles: A Guide For Children (About...) (The About Series)

By Cathryn Sill, Cathryn P. Sill

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Depicts How Physical Characteristics, Habitat, Movement, Feeding And Hunting Behavior, And Life Cycle Can Vary In Different Kinds Of Reptiles, Including The Corn Snake, Eastern Box Turtle, And Amer...

About insects

By Cathryn P. Sill

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Describes the anatomy, behavior, and habitat of various insects, including the beetle, moth, and cockroach.

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.