Henry Strutz Books

Now You re Talking German in No Time Now You re Talking Packages

By Henry Strutz

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Now You re Talking German with Cassette

By Henry Strutz

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Barron's 1001 pitfalls in German

By Henry Strutz

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A supplementary textbook outlining fundamentals of the German language and providing help for common obstacles such as declensions, pronoun agreement, time expressions, and letter writing.

1001 Pitfalls in German

By Henry Strutz

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A supplementary textbook outlining fundamentals of the German language and providing help for common obstacles such as declensions, pronoun agreement, time expressions, and letter writing.

Three Hundred and One German Verbs

By Christopher Kenoris, Henry Strutz

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2001 German and English idioms

By Henry Strutz

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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.