Klein David Books

More for your money

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Suggestions for increasing one's income, saving money, buying by mail, dealing with warranties and guarantees, buying items by special purchase or below wholesale cost, and comparing prices.

Yourself ten years from now

By Klein David

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Advice for planning a career which includes getting to know oneself, money, education, attitudes, family influence, and coping with the system.

Examines, through pertinent examples and anecdotes, how reality is often distorted by commonly held myths and misconceptions, misleading advertising, and misuse of statistics and survey results. Al...

Your parents and your self

By Klein David

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Examines the effects of parents and home experience on the life and behavior of young people, discussing such aspects as genetics, environment, learning, intelligence, moral attitudes, character bu...

Getting unscrewed and staying that way

By Klein David

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Gradspot.com s guide to life after college

By Klein David

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Au Revoir et Adieu

By Klein Ph.D.

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Milestones to Shakespeare

By Klein David

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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.