Jay Schleifer Books

Discusses the set of ethics, practices, and habits that promote a strong attachment to the value of work and doing the best job possible, regardless of factors such as money and prestige.

Danger Angels

By Jay Schleifer

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Our Declaration of Independence

By Jay Schleifer

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Fighter planes

By Jay Schleifer

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Traces the history of fighter aircraft, focusing on the most significant models of the major world powers, and describes the "dream planes" of the future.

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.