Jean Van Leeuwen Books

In comfortable residence at Macy's during the Christmas season, Merciless Marvin the Magnificent and his gang are convinced that the store's Santa Claus has been kidnapped and determine to save him.

The great Christmas kidnaping caper

By Jean Van Leeuwen

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In comfortable residence at Macy's during the Christmas season, Merciless Marvin the Magnificent and his gang are convinced that the store's Santa Claus has been kidnapped and determine to save him.

Too hot for ice cream.

By Jean Van Leeuwen

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After Sara's plans to go swimming on the hottest day of the summer have to be cancelled, everything starts to go wrong.

Too Hot for Ice Creatures

By Jean Van Leeuwen

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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.