Peter Tremayne Books

An Ensuing Evil and Others: Fourteen Historical Mysteries

By Peter Berresford Ellis

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Master of Souls: A Mystery of Ancient Ireland

By Peter Berresford Ellis

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In seventh-century Ireland, Sister Fidelma investigates the brutal murders of an abbess--who is the niece of the Ui Fidgente warlord Conri--and one of the abbey's senior scholars as well as the dis...

A Prayer for the Damned: A Mystery of Ancient Ireland

By Peter Berresford Ellis

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The Leper's Bell

By Peter Berresford Ellis

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Master Of Souls

By Peter Berresford Ellis, Peter Tremayne

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In January of 668 A.D., Fidelma of Cashel - sister to the king of Muman, advocate of the Brehon law courts and religieuse in the Celtic Church - is called to investigate the brutal murder of Abbess...

Dancing with Demons: A Mystery of Ancient Ireland

By Peter Berresford Ellis

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Council of the Cursed

By Peter Berresford Ellis

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Counseling a hostile Irish delegation to the Celtic church of 670 A.D., Fidelma of Cashel is embroiled in a politically tenacious investigation when one of the delegates is found murdered, a case t...

The dove of death

By Peter Berresford Ellis

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Surviving a pirate attack during which her cousin and other innocent victims were murdered, Fidelma of Cashel and her faithful companion, Brother Eadulf, pursue clues throughout seventh-century Bre...

Dancing with Demons: A Mystery of Ancient Ireland

By Peter Berresford Ellis

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The Dove of Death: A Mystery of Ancient Ireland

By Peter Berresford Ellis

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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.