David Helvarg Books

Saved By the Sea: A Love Story with Fish

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This honestly told tale of the changes in one man's journey and the world's ocean over the last half-century is also a profound, startling, and sometimes surprisingly funny reflection on the state...

Blue frontier

By David Helvarg

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Blue Frontier

By David Helvarg

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The war against the greens

By David Helvarg

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The War Against the Greens

By David Helvarg

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The war against the greens

By David Helvarg

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The Ocean and Coastal Conservation Guide 2005 2006

By David Helvarg

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The Ocean and Coastal Conservation Guide 2005 2006

By David Helvarg

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Blue frontier

By David Helvarg

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Saved by the sea

By David Helvarg

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"Acclaimed as 'the premier chronicler of America's complex relationship with our oceans' (Honolulu Weekly), David Helvarg has also been a war correspondent, investigative journalist, documentary pr...

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.