Ray Riegert Books

Hidden Coast of California

By Ray Riegert

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Hidden Highways Northern California: Discover Your Own Road to the Unexpected.

By Ray Riegert

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Hidden Highways Northern California shows the way to adventure along lost highways, through small towns, and in wilderness areas. Eleven journeys are detailed, from Route 1 along the coast to Highw...

Hidden Big Island of Hawaii

By Ray Riegert

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Hidden Maui

By Ray Riegert

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Hidden Kauai

By Ray Riegert

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Hidden San Francisco and Northern California

By Ray Riegert

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Hidden Southern California Hidden Travel

By Ray Riegert

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Hidden Los Angeles Hidden Travel

By Ellen Clark, Ray Riegert

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Hidden Oahu

By Ray Riegert

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"Hidden Oahu" includes twice as many Hidden listings as previous editions. This guide is perfect for lovers of hot beaches and warm water with complete information on swimming, snorkeling, scuba di...

Hidden Coast of California

By Ray Riegert

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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.