Linnea Hartsuyker Books

The Half-Drowned King: A Novel

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"The first installment in a debut trilogy, THE HALF-DROWNED KING tells the compelling story of the political intrigues, battles, and struggles for power that led to the rise of King Harald the Fair...

The Half Drowned King

By Linnea Hartsuyker

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The Sea Queen

By Linnea Hartsuyker

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The Sea Queen

By Linnea Hartsuyker

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Golden Wolf Saga

By Linnea Hartsuyker

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Half Drowned King

By Linnea Hartsuyker

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Sea Queen

By Linnea Hartsuyker

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The golden wolf a novel

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Sea Queen

By Linnea Hartsuyker

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The Golden Wolf: A Novel

By Linnea Hartsuyker

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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.