Loren C. Larson Books

Problem-Solving Through Problems

By Loren C. Larson

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Problem Solving Through Problems

By Loren C. Larson

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This is a practical anthology of some of the best elementary problems in different branches of mathematics. They are selected for their aesthetic appeal as well as their instructional value, and ar...

Algebra and trigonometry refresher for calculusstudents

By Loren C. Larson

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Wohascum County Problem Book Dolciani Mathematical Expositions

By George T. Gilbert, Loren C. Larson, Mark Krusemeyer

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William Lowell Putnam Mathematical Competition 1965 1984

By Gerald L. Alexanderson

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The William Lowell Putnam Mathematical Competition

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The Inquisitive Problem Solver MAA Problem Book Series

By Richard K. Guy, Loren C. Larson, Paul Vaderlind

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A mathematical orchard

By Mark Krusemeyer

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This volume is a republication and expansion of the much-loved Wohascum County Problem Book, published in 1993. The original 130 problems have been retained and supplemented by an additional 78 pro...

Problem Solving Through Problems Problem Books in Mathematics

By Loren C. Larson

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Sugakohasso Seminar I

By L.C. Larson

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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.