Mark E. Randall Books

Greenberg'S Guide To Marbles

By Mark E. Randall, Bruce C. Greenberg, Christian F. Rohlfing

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Traces the history of Lionel's colorful and rugged pre-World War II Standard and O gauge train sets. Includes detailed photographs, set contents lists, and product descriptions with valuations. By...

Greenberg'S Guide To Marbles

By Mark E. Randall

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Greenberg'S Guide To Marbles

By Dennis Webb, Mark E. Randall

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A tour of the colorful history of marbles. Shows marble-making technology, and tells how to identity the different types of marbles. Includes marble-making stories, marble company histories, and a...

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.