Robert Froman Books

Seeing Things

By Robert Froman

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Bigger and smaller.

By Robert Froman

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Explains the concept of relative size by comparing the "large" and "small" characteristics of various objects, animals, and people.

Bigger and Smaller Young Math

By Gioia Fiammenghi, Robert Froman

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Mushrooms and molds.

By Robert Froman

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Describes mushrooms, molds, and other fungi and their function in the cycle of growing things.

Mushrooms and molds.

By Robert Froman

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Describes mushrooms, molds, and other fungi and their function in the cycle of growing things.

Rubber bands, baseballs and doughnuts

By Robert Froman

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Experiments with rubber bands, pencil, paper, rulers, balloons, doughnuts, and scissors introduce the principles of topology.

Rubber bands, baseballs and doughnuts

By Robert Froman

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Experiments with rubber bands, pencil, paper, rulers, balloons, doughnuts, and scissors introduce the principles of topology.

Venn diagrams.

By Robert Froman

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An introduction to Venn diagrams in their simplest form--circles which sort things into categories.

Venn diagrams.

By Robert Froman

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An introduction to Venn diagrams in their simplest form--circles which sort things into categories.

Spiders, Snakes and Other Outcasts.

By Robert Froman

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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.