Mary Higgins Clark Books

When a famous author is found murdered, the owner at the boutique the author frequented finds herself thinking about her mother's long-unsolved murder.

The Anastasia Syndrome and Other Stories

By Mary Higgins Clark

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Terror Stalks the Class Reunion

By Mary Higgins Clark

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Remember me

By Mary Higgins Clark

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A tale of the occult. In her mansion on Cape Cod, Menley Nichols is grieving the death of Bobby, her two-year-old-son killed at a railroad crossing. For company she has her infant daughter, Hannah....

Let me call you sweetheart

By Mary Higgins Clark

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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.