Roger A. Caras Books

Mysteries of nature, explained and unexplained

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Presents theories and explanations for puzzling natural phenomena, including screams heard in the nighttime forest and whales that strand themselves on beaches and die.

A zoo in your room

By Roger A. Caras

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A guide to the care and feeding of more than thirty species of mammals, birds, fish, reptiles, amphibians, insects, and other animals that could be kept in a bedroom.

DANGEROUS TO MAN

By Roger A. Caras

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A Cat is Watching

By Roger A. Caras

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As anyone who shares a home with a cat will know, all cats are people watchers. As we go about our daily lives, our cat is watching, and perhaps understanding, us in a way we cannot comprehend. Now...

Dog Is Listening

By Roger A. Caras

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The forest

By Roger A. Caras

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A field guide to venomous animals and poisonous plants, North America, north of Mexico

By Steven Foster

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A Field Guide to Venomous Animals and Poisonous Plants

By Roger A. Caras, Steven Foster

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Yankee

By Roger A. Caras

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An animal lover and professional naturalist describes his family's adventures in raising a personable bloodhound into a champion show dog.

Going for the Blue

By Roger A. Caras

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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.