Robert Froman Books

Hot and cold and in between

By Robert Froman

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Defines what constitutes hot and cold emphasizing that heat always flows to cooler surfaces and zones.

Hot and Cold and in Between

By Robert Froman

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Arithmetic for human beings.

By Robert Froman

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Science Art and Visual Illusions

By Robert Froman

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Seeing things

By Robert Froman

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The words of these fifty-one brief poems are arranged on the pages in shapes appropriate to the subject of the poem.

A game of functions.

By Robert Froman

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Gives directions for a game which demonstrates the basic principles of functions and graphs.

A game of functions.

By Robert Froman

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Gives directions for a game which demonstrates the basic principles of functions and graphs.

Angles are easy as pie

By Robert Froman

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Discusses facts about angles and their relationship to triangles, quadrangles, polygons, and circles.

Angles are easy as pie

By Robert Froman

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Discusses facts about angles and their relationship to triangles, quadrangles, polygons, and circles.

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.