Will Kostakis Books

The sidekicks

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Ryan, Harley, and Miles have nothing in common except their friendship with Isaac, but when Isaac dies unexpectedly, the boys come to realize that they have more in common than they previously thou...

First Third

By Will Kostakis

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Sean

By Will Kostakis

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Sidekicks

By Will Kostakis

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Lot of Stuff Happens

By Oliver Phommavanh, Will Kostakis, Andrew Daddo, Adrian Beck

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Greatest Hit

By Will Kostakis

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Begin End Begin A LoveOzYA Anthology

By Michael Pryor, Danielle Binks, Will Kostakis, Melissa Keil, Jaclyn Moriarty, Amie Kaufman, Gabrielle Tozer, Lili Wilkinson, Ellie Marney

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Begin End Begin

By Michael Pryor, Will Kostakis, Melissa Keil, Jaclyn Moriarty, Amie Kaufman

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Begin End Begin

By Danielle Binks, Will Kostakis, Melissa Keil, Amie Kaufman, Ellie Marney

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Sidekicks

By Will Kostakis

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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.