Bobi Martin Books

Kidding around San Francisco

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Provides information on landmarks, museums, parks, sports activities, entertainment, restaurants, and more things to see and do in San Francisco.

Painting the Fire

By Liz Farrington, Jonathan Sherwood, Hui Han Liu, Bobi Martin, Gudrun Hoy

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With the help of Mrs. Murgatroyd's magical paints, Ryan learns to deal with his anger and to confront the class bully.

What Are Air Masses and Weather Fronts

By Bobi Martin

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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.