Sam Wellman Books

C.S. Lewis

By Sam Wellman

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Presents the life and times of the author who created the fantasy world of Narnia.

Mother Teresa

By Sam Wellman

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Presents the life and times of the nun who founded the Order of the Missionaries of Charity in Calcutta, won the Nobel Peace Prize, and dedicated her life to helping the destitute.

John Bunyan

By Sam Wellman

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Describes the life of John Bunyan, itinerant English Puritan preacher and author of many religious books and sermons, including "Pilgrim's Progress."

David Livingstone

By Sam Wellman

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Discusses the explorer's formative years in Scotland, training as a missionary, expeditions to Africa, and many discoveries there.

George Washington Carver

By Sam Wellman

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A biography of the African American scientist who overcame tremendous hardship, received a college education, and made important discoveries in the field of agriculture.

Ben Affleck

By Sam Wellman

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A biography of the film actor who, with his longtime friend Matt Damon, received the 1998 Academy Award for Best Original Screenplay.

Mariah Carey Galaxy of Superstars

By Sam Wellman

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T.D. Jakes Black Americans of Achievement

By Sam Wellman

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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.