Robert Holtom Books

After the Fall Tales of the Apocalypse

By Javier Moyano Perez, Andrea Mullaney, Andrew Saxsma, Paul S Huggins, Liam K Brown, Claire Fuller, Ilana Masad, Thomas Brown, Robert Holtom, Damon DiMarco

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Dumbledore Is So Gay

By Robert Holtom

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A Queer Case

By Robert Holtom

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A gripping 1920s-set whodunnit, this debut features a queer sleuth who must solve a murder in a mansion on London’s Hampstead Heath without revealing his sexuality, lest he be arrested as a c...

A Queer Case

By Robert Holtom

Average: 0.00, 0 Ratings

A gripping 1920s-set whodunnit, this debut features a queer sleuth who must solve a murder in a mansion on London’s Hampstead Heath without revealing his sexuality, lest he be arrested as a c...

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.