Hans Paul Guth Books

Advanced Composition

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An advanced eleventh-grade English composition text including instructions on writing paragraphs, papers, descriptive, narrative, and polemical pieces, and letters, and on spelling and punctuation.

Our Common Language

By Hans Paul Guth

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An eighth-grade, English text offering instruction in the areas of composition, word study, grammar, usage, mechanics, and speech.

American English Today

By Hans Paul Guth

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The world of English

By Hans Paul Guth

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American English Today: The Uses of Language

By Hans Paul Guth

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An 11th grade text offering instruction in composition, word study, grammar, usage, mechanics, and speech.

Our changing language

By Hans Paul Guth

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A 12th grade text offering instruction in composition, word study, grammar, usage, mechanics, and speech.

American English Today the Word of English 10

By Hans P. Guth

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English for a new generation

By Hans Paul Guth

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Today: A text-workbook for English language and composition,

By Hans Paul Guth

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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.