Philip Geer Books

6 SAT Practice Tests Online Practice

By Philip Geer, Stephen A. Reiss

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6 SAT Practice Tests

By Philip Geer, Stephen A. Reiss

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Digital SAT Practice Questions 2024

By Philip Geer, Stephen A. Reiss

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Digital SAT Practice Questions 2024

By Philip Geer, Stephen A. Reiss

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Picture These SAT Words in a Flash

By Philip Geer

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This set of vocabulary-building flash cards present cartoon illustrations showing visual puns with sample sentences and verbal mnemonics with definitions given on the reverse side of each card. Wo...

Digital SAT Practice Questions Fourth Edition

By Philip Geer, Stephen A. Reiss

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Digital SAT Practice Questions, Fourth Edition

By Philip Geer, Stephen A. Reiss

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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.