Astrid Holleeder Books

Judas: How a Sister's Testimony Brought Down a Criminal Mastermind

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"This stunning, edge-of-your seat memoir chronicles Astrid's terrifying experience working as a double agent, preserving her brother's trust just so that she could get enough information to put him...

Judas

By Astrid Holleeder

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Judas

By Astrid Holleeder

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Judas

By Astrid Holleeder, Laura Manero Jimenez

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Dagboek van een getuige

By Astrid Holleeder

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Na het boek 'Judas', komt Astrid Holleeder nu met een verrassend intieme opvolger: 'Dagboek van een getuige'. Waar 'Judas' het verhaal is over de beslissing om te getuigen tegen haar broer Willem H...

Familiegeheimen

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Judas

By Astrid Holleeder

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"Astrid en Sonja Holleeder besluiten in 2013 te doen wat niemand voor mogelijk hield: ze staan op tegen hun broer Willem - die na zijn vrijlating in 2012 tot nationale knuffelcrimineel was uitgegro...

Judas

By Astrid Holleeder

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Judas

By Astrid Holleeder

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Judas

By Astrid Holleeder

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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.