Mary Willis Walker Books

Unter des Kafers Keller

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In einem unterirdischen Raum werden elf Kinder und ihr Betreuer seit vielen Wochen gefangehalten. Kann ein geheimnisvolles Gedicht der Schlüssel zur Freiheit werden?

Un psicópata va a ser ejecutado. La periodista Molly Cates no está segura de que sea el responsable de todos los crímenes de los que se le acusa. Y justo entonces aparece un nuevo asesino que se de...

El grito rojo

By Mary Willis Walker

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Sotano del Terror El

By Mary Willis Walker

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Under the Beetle s Cellar

By Mary Willis Walker

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All the Dead Lie Down

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When crime reporter Molly Cates’s father died more than twenty-five years ago, the case was ruled a suicide, and Molly’s efforts to prove otherwise led to nothing but anguish and the breakup of her...

The Red Scream

By Mary Willis Walker

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Zero at the Bone

By Mary Walker

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Statues de sang

By Mary Willis Walker

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Der rote Schrei.

By Mary Willis Walker

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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.