Ruth Downie Books

Persona non grata

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Gaius Petreius Ruso and his companion, Tilla, become embroiled in a family scandal when Severus, the family's chief creditor, winds up dead.

Tabula rasa

By Ruth Downie

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The medicus Ruso and his wife Tilla are back in the borderlands of Britannia, this time helping to tend the builders of Hadrian's Great Wall. Having been forced to move off their land, the Britons...

Memento mori

By Ruth Downie

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The eighth gripping novel in the bestselling Medicus series, in which Ruso and Tilla investigate the death of the wife of Ruso's friend in the sacred hot spring of Aquae Sulis.

Year of Ravens

By Russell Whitfield, Eliza Knight, Kate Quinn, Vicky Alvear, Ruth Downie

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Song of War

By Stephanie Dray, Eliza Knight, Kate Quinn, Vicky Alvear, Ruth Downie

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Ruso and the Disappearing Dancing Girls

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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.