Leslie Kean Books

Surviving Death

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THE INSPIRATION FOR THE NETFLIX ORIGINAL SERIES • An impeccably researched, page-turning investigation, revealing stunning and wide-ranging evidence suggesting that consciousness survives death, fr...

OVNIs Des generaux des pilotes et des officiels parlent

By Leslie Kean, Jean Francois Clervoy, Gildas Bourdais

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UFOs

By Leslie Kean, Heather Henderson

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UAPs and the Nuclear Puzzle

By Leslie Kean, Stanton T. Friedman, Robert Salas

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UFOs

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NEW YORK TIMES BESTSELLER • Impeccably researched, this riveting journalistic investigation separates fact from fiction, and documents the unexplained mysteries of—and government reactions to—actua...

Surviving Death

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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.