Mary M. Tolan Books

Ralph Nader

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A biography of the consumer advocate who devotes his life to crusading for citizens' rights, such as safer cars, cleaner food, and truthful advertising.

Sojourner Truth

By Mary M. Tolan

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Follows the life of the former slave who gained renown as an abolitionist and advocate of women's rights.

Florence Nightingale

By Mary M. Tolan

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Recounts the life story of the English girl who became a famous nurse and dedicated herself to the alleviation of suffering at home and abroad.

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.