Leigh Calvez Books

The Hidden Lives of Owls

By Karen White, Leigh Calvez

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The Hidden Lives of Owls

By Leigh Calvez

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“You’ll come away from this riveting book blessed with owl wisdom that will enlarge your world forever.” —Sy Montgomery, author of Birdology and The Soul of an OctopusI...

The Breath of a Whale

By Leigh Calvez

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Discover the elusive lives of Pacific Ocean whales as the the New York Times–bestselling author of The Hidden Life of Owls “offers the whale watch most of us can only dream of” (S...

The Breath of a Whale Lib E

By Leigh Calvez, Harper Audio

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The Breath of a Whale

By Leigh Calvez

Average: 0.00, 0 Ratings

Discover the elusive lives of Pacific Ocean whales as the the New York Times–bestselling author of The Hidden Life of Owls “offers the whale watch most of us can only dream of” (S...

The Hidden Lives of Owls

By Leigh Calvez

Average: 0.00, 0 Ratings

“You’ll come away from this riveting book blessed with owl wisdom that will enlarge your world forever.” —Sy Montgomery, author of Birdology and The Soul of an OctopusI...

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.