David Helvarg Books

50 Ways to Save the Ocean Inner Ocean Action Guide Inner Ocean Action Guide

By David Helvarg

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The golden shore

By David Helvarg

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A sweeping history of the California coastline documents its changing culture and ecology while exploring its role in the state's efforts to counter environmental disasters, citing the influence of...

Rescue Warriors

By David Helvarg

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Rescue warriors

By David Helvarg

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Golden Shore

By David Helvarg

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Saved by the Sea

By David Helvarg

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Rescue Warriors

By David Helvarg

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50 Ways to Save the Ocean

By David Helvarg, Jim Toomey

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Blue Frontier

By David Helvarg

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Golden Shore

By David Helvarg, Ted Danson

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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.