Helaine Olen Books

The Index Card

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“The newbie investor will not find a better guide to personal finance.” —Burton Malkiel, author of A RANDOM WALK DOWN WALL STREET TV analysts and money managers would have you believe your financ...

Office Mate

By Stephanie Losee, Helaine Olen

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Office Mate

By Stephanie Kisee, Helaine Olen

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Office Mate

By Stephanie Kisee, Helaine Olen

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Office Mate

By Stephanie Kisee, Helaine Olen

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Pound Foolish

By Helaine Olen

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If you’ve ever bought a personal finance book, watched a TV show about stock picking, listened to a radio show about getting out of debt, or attended a seminar to help you plan for your retir...

The Index Card

By Harold Pollack, Helaine Olen

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“The newbie investor will not find a better guide to personal finance.” —Burton Malkiel, author of A RANDOM WALK DOWN WALL STREET   TV analysts and m...

Pound Foolish

By Helaine Olen

Average: 0.00, 0 Ratings

If you’ve ever bought a personal finance book, watched a TV show about stock picking, listened to a radio show about getting out of debt, or attended a seminar to help you plan for your retir...

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.